diff --git a/internal/pkg/core/common.go b/internal/pkg/core/common.go
index f959b7f..43f0047 100644
--- a/internal/pkg/core/common.go
+++ b/internal/pkg/core/common.go
@@ -18,7 +18,7 @@
 package core
 
 import (
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 )
 
 var logger log.CLogger
diff --git a/internal/pkg/core/device_handler.go b/internal/pkg/core/device_handler.go
index 7f2b53e..4243a26 100644
--- a/internal/pkg/core/device_handler.go
+++ b/internal/pkg/core/device_handler.go
@@ -35,12 +35,12 @@
 	"github.com/golang/protobuf/ptypes"
 	grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
 	grpc_opentracing "github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing"
-	"github.com/opencord/voltha-lib-go/v4/pkg/adapters/adapterif"
-	"github.com/opencord/voltha-lib-go/v4/pkg/config"
-	"github.com/opencord/voltha-lib-go/v4/pkg/events/eventif"
-	flow_utils "github.com/opencord/voltha-lib-go/v4/pkg/flows"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
-	"github.com/opencord/voltha-lib-go/v4/pkg/pmmetrics"
+	"github.com/opencord/voltha-lib-go/v5/pkg/adapters/adapterif"
+	"github.com/opencord/voltha-lib-go/v5/pkg/config"
+	"github.com/opencord/voltha-lib-go/v5/pkg/events/eventif"
+	flow_utils "github.com/opencord/voltha-lib-go/v5/pkg/flows"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/pmmetrics"
 
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
 	rsrcMgr "github.com/opencord/voltha-openolt-adapter/internal/pkg/resourcemanager"
@@ -82,7 +82,9 @@
 	flowMgr       []*OpenOltFlowMgr
 	groupMgr      *OpenOltGroupMgr
 	eventMgr      *OpenOltEventMgr
-	resourceMgr   *rsrcMgr.OpenOltResourceMgr
+	resourceMgr   []*rsrcMgr.OpenOltResourceMgr
+
+	deviceInfo *oop.DeviceInfo
 
 	discOnus                      sync.Map
 	onus                          sync.Map
@@ -528,9 +530,6 @@
 					_ = olterrors.NewErrAdapter("handle-indication-error", log.Fields{"type": "interface-oper-nni", "device-id": dh.device.Id}, err).Log()
 				}
 			}()
-			if err := dh.resourceMgr.AddNNIToKVStore(ctx, intfOperInd.GetIntfId()); err != nil {
-				logger.Warn(ctx, err)
-			}
 		} else if intfOperInd.GetType() == "pon" {
 			// TODO: Check what needs to be handled here for When PON PORT down, ONU will be down
 			// Handle pon port update
@@ -826,29 +825,35 @@
 }
 
 func (dh *DeviceHandler) initializeDeviceHandlerModules(ctx context.Context) error {
-	deviceInfo, err := dh.populateDeviceInfo(ctx)
+	var err error
+	dh.deviceInfo, err = dh.populateDeviceInfo(ctx)
 
 	if err != nil {
 		return olterrors.NewErrAdapter("populate-device-info-failed", log.Fields{"device-id": dh.device.Id}, err)
 	}
-	dh.totalPonPorts = deviceInfo.GetPonPorts()
-	dh.agentPreviouslyConnected = deviceInfo.PreviouslyConnected
+	dh.totalPonPorts = dh.deviceInfo.GetPonPorts()
+	dh.agentPreviouslyConnected = dh.deviceInfo.PreviouslyConnected
 
-	// Instantiate resource manager
-	if dh.resourceMgr = rsrcMgr.NewResourceMgr(ctx, dh.device.Id, dh.openOLT.KVStoreAddress, dh.openOLT.KVStoreType, dh.device.Type, deviceInfo, dh.cm.Backend.PathPrefix); dh.resourceMgr == nil {
-		return olterrors.ErrResourceManagerInstantiating
-	}
-
-	dh.groupMgr = NewGroupManager(ctx, dh, dh.resourceMgr)
-
+	dh.resourceMgr = make([]*rsrcMgr.OpenOltResourceMgr, dh.totalPonPorts)
 	dh.flowMgr = make([]*OpenOltFlowMgr, dh.totalPonPorts)
-	for i := range dh.flowMgr {
-		// Instantiate flow manager
-		if dh.flowMgr[i] = NewFlowManager(ctx, dh, dh.resourceMgr, dh.groupMgr, uint32(i)); dh.flowMgr[i] == nil {
+	var i uint32
+	for i = 0; i < dh.totalPonPorts; i++ {
+		// Instantiate resource manager
+		if dh.resourceMgr[i] = rsrcMgr.NewResourceMgr(ctx, i, dh.device.Id, dh.openOLT.KVStoreAddress, dh.openOLT.KVStoreType, dh.device.Type, dh.deviceInfo, dh.cm.Backend.PathPrefix); dh.resourceMgr[i] == nil {
 			return olterrors.ErrResourceManagerInstantiating
 		}
 	}
-
+	// GroupManager instance is per OLT. But it needs a reference to any instance of resourceMgr to interface with
+	// the KV store to manage mcast group data. Provide the first instance (0th index)
+	if dh.groupMgr = NewGroupManager(ctx, dh, dh.resourceMgr[0]); dh.groupMgr == nil {
+		return olterrors.ErrGroupManagerInstantiating
+	}
+	for i = 0; i < dh.totalPonPorts; i++ {
+		// Instantiate flow manager
+		if dh.flowMgr[i] = NewFlowManager(ctx, dh, dh.resourceMgr[i], dh.groupMgr, i); dh.flowMgr[i] == nil {
+			return olterrors.ErrFlowManagerInstantiating
+		}
+	}
 	/* TODO: Instantiate Alarm , stats , BW managers */
 	/* Instantiating Event Manager to handle Alarms and KPIs */
 	dh.eventMgr = NewEventMgr(dh.EventProxy, dh)
@@ -913,7 +918,7 @@
 
 			ports, err := dh.coreProxy.ListDevicePorts(log.WithSpanFromContext(context.Background(), ctx), dh.device.Id)
 			if err != nil {
-				logger.Warnw(ctx, "failed-to-list-ports", log.Fields{"device-id": dh.device.Id, "error": err})
+				logger.Warnw(ctx, "failed-to-list-ports", log.Fields{"device-id": dh.device.Id, "err": err})
 				continue
 			}
 			for _, port := range ports {
@@ -935,10 +940,9 @@
 					}
 					logger.Debugw(ctx, "publish-pon-metrics", log.Fields{"pon-port": port.Label})
 
-					//ONU & Gem Stats
-					onuGemInfo := dh.flowMgr[intfID].onuGemInfo
-					if len(onuGemInfo) != 0 {
-						go dh.portStats.collectOnuAndGemStats(ctx, onuGemInfo)
+					onuGemInfoLst := dh.flowMgr[intfID].getOnuGemInfoList()
+					if len(onuGemInfoLst) > 0 {
+						go dh.portStats.collectOnuAndGemStats(ctx, onuGemInfoLst)
 					}
 				}
 			}
@@ -978,6 +982,15 @@
 	}, nil
 }
 
+// GetInterAdapterTechProfileDownloadMessage fetches the TechProfileDownloadMessage for the caller.
+func (dh *DeviceHandler) GetInterAdapterTechProfileDownloadMessage(ctx context.Context, tpPath string, ponPortNum uint32, onuID uint32, uniID uint32) *ic.InterAdapterTechProfileDownloadMessage {
+	ifID, err := IntfIDFromPonPortNum(ctx, ponPortNum)
+	if err != nil {
+		return nil
+	}
+	return dh.flowMgr[ifID].getTechProfileDownloadMessage(ctx, tpPath, ifID, onuID, uniID)
+}
+
 func (dh *DeviceHandler) omciIndication(ctx context.Context, omciInd *oop.OmciIndication) error {
 	logger.Debugw(ctx, "omci-indication", log.Fields{"intf-id": omciInd.IntfId, "onu-id": omciInd.OnuId, "device-id": dh.device.Id})
 	var deviceType string
@@ -1038,44 +1051,47 @@
 func (dh *DeviceHandler) ProcessInterAdapterMessage(ctx context.Context, msg *ic.InterAdapterMessage) error {
 	logger.Debugw(ctx, "process-inter-adapter-message", log.Fields{"msgID": msg.Header.Id})
 	if msg.Header.Type == ic.InterAdapterMessageType_OMCI_REQUEST {
-		msgID := msg.Header.Id
-		fromTopic := msg.Header.FromTopic
-		toTopic := msg.Header.ToTopic
-		toDeviceID := msg.Header.ToDeviceId
-		proxyDeviceID := msg.Header.ProxyDeviceId
+		return dh.handleInterAdapterOmciMsg(ctx, msg)
+	}
+	return olterrors.NewErrInvalidValue(log.Fields{"inter-adapter-message-type": msg.Header.Type}, nil)
+}
 
-		logger.Debugw(ctx, "omci-request-message-header", log.Fields{"msgID": msgID, "fromTopic": fromTopic, "toTopic": toTopic, "toDeviceID": toDeviceID, "proxyDeviceID": proxyDeviceID})
+func (dh *DeviceHandler) handleInterAdapterOmciMsg(ctx context.Context, msg *ic.InterAdapterMessage) error {
+	msgID := msg.Header.Id
+	fromTopic := msg.Header.FromTopic
+	toTopic := msg.Header.ToTopic
+	toDeviceID := msg.Header.ToDeviceId
+	proxyDeviceID := msg.Header.ProxyDeviceId
 
-		msgBody := msg.GetBody()
+	logger.Debugw(ctx, "omci-request-message-header", log.Fields{"msgID": msgID, "fromTopic": fromTopic, "toTopic": toTopic, "toDeviceID": toDeviceID, "proxyDeviceID": proxyDeviceID})
 
-		omciMsg := &ic.InterAdapterOmciMessage{}
-		if err := ptypes.UnmarshalAny(msgBody, omciMsg); err != nil {
-			return olterrors.NewErrAdapter("cannot-unmarshal-omci-msg-body", log.Fields{"msgbody": msgBody}, err)
+	msgBody := msg.GetBody()
+
+	omciMsg := &ic.InterAdapterOmciMessage{}
+	if err := ptypes.UnmarshalAny(msgBody, omciMsg); err != nil {
+		return olterrors.NewErrAdapter("cannot-unmarshal-omci-msg-body", log.Fields{"msgbody": msgBody}, err)
+	}
+
+	if omciMsg.GetProxyAddress() == nil {
+		onuDevice, err := dh.coreProxy.GetDevice(log.WithSpanFromContext(context.TODO(), ctx), dh.device.Id, toDeviceID)
+		if err != nil {
+			return olterrors.NewErrNotFound("onu", log.Fields{
+				"device-id":     dh.device.Id,
+				"onu-device-id": toDeviceID}, err)
 		}
-
-		if omciMsg.GetProxyAddress() == nil {
-			onuDevice, err := dh.coreProxy.GetDevice(log.WithSpanFromContext(context.TODO(), ctx), dh.device.Id, toDeviceID)
-			if err != nil {
-				return olterrors.NewErrNotFound("onu", log.Fields{
-					"device-id":     dh.device.Id,
-					"onu-device-id": toDeviceID}, err)
-			}
-			logger.Debugw(ctx, "device-retrieved-from-core", log.Fields{"msgID": msgID, "fromTopic": fromTopic, "toTopic": toTopic, "toDeviceID": toDeviceID, "proxyDeviceID": proxyDeviceID})
-			if err := dh.sendProxiedMessage(ctx, onuDevice, omciMsg); err != nil {
-				return olterrors.NewErrCommunication("send-failed", log.Fields{
-					"device-id":     dh.device.Id,
-					"onu-device-id": toDeviceID}, err)
-			}
-		} else {
-			logger.Debugw(ctx, "proxy-address-found-in-omci-message", log.Fields{"msgID": msgID, "fromTopic": fromTopic, "toTopic": toTopic, "toDeviceID": toDeviceID, "proxyDeviceID": proxyDeviceID})
-			if err := dh.sendProxiedMessage(ctx, nil, omciMsg); err != nil {
-				return olterrors.NewErrCommunication("send-failed", log.Fields{
-					"device-id":     dh.device.Id,
-					"onu-device-id": toDeviceID}, err)
-			}
+		logger.Debugw(ctx, "device-retrieved-from-core", log.Fields{"msgID": msgID, "fromTopic": fromTopic, "toTopic": toTopic, "toDeviceID": toDeviceID, "proxyDeviceID": proxyDeviceID})
+		if err := dh.sendProxiedMessage(ctx, onuDevice, omciMsg); err != nil {
+			return olterrors.NewErrCommunication("send-failed", log.Fields{
+				"device-id":     dh.device.Id,
+				"onu-device-id": toDeviceID}, err)
 		}
 	} else {
-		return olterrors.NewErrInvalidValue(log.Fields{"inter-adapter-message-type": msg.Header.Type}, nil)
+		logger.Debugw(ctx, "proxy-address-found-in-omci-message", log.Fields{"msgID": msgID, "fromTopic": fromTopic, "toTopic": toTopic, "toDeviceID": toDeviceID, "proxyDeviceID": proxyDeviceID})
+		if err := dh.sendProxiedMessage(ctx, nil, omciMsg); err != nil {
+			return olterrors.NewErrCommunication("send-failed", log.Fields{
+				"device-id":     dh.device.Id,
+				"onu-device-id": toDeviceID}, err)
+		}
 	}
 	return nil
 }
@@ -1129,7 +1145,6 @@
 	if err := dh.flowMgr[intfID].UpdateOnuInfo(ctx, intfID, uint32(onuID), serialNumber); err != nil {
 		return olterrors.NewErrAdapter("onu-activate-failed", log.Fields{"onu": onuID, "intf-id": intfID}, err)
 	}
-	// TODO: need resource manager
 	var pir uint32 = 1000000
 	Onu := oop.Onu{IntfId: intfID, OnuId: uint32(onuID), SerialNumber: serialNum, Pir: pir, OmccEncryption: dh.openOLT.config.OmccEncryption}
 	if _, err := dh.Client.ActivateOnu(ctx, &Onu); err != nil {
@@ -1182,7 +1197,7 @@
 				alarmInd.LosStatus = statusCheckOff
 				go func() {
 					if err := dh.eventMgr.onuAlarmIndication(ctx, &alarmInd, onuInCache.(*OnuDevice).deviceID, raisedTs); err != nil {
-						logger.Debugw(ctx, "indication-failed", log.Fields{"error": err})
+						logger.Debugw(ctx, "indication-failed", log.Fields{"err": err})
 					}
 				}()
 			}
@@ -1220,7 +1235,7 @@
 		logger.Debugw(ctx, "creating-new-onu", log.Fields{"sn": sn})
 		// we need to create a new ChildDevice
 		ponintfid := onuDiscInd.GetIntfId()
-		onuID, err = dh.resourceMgr.GetONUID(ctx, ponintfid)
+		onuID, err = dh.resourceMgr[ponintfid].GetONUID(ctx, ponintfid)
 
 		logger.Infow(ctx, "creating-new-onu-got-onu-id", log.Fields{"sn": sn, "onuId": onuID})
 
@@ -1236,13 +1251,13 @@
 		if onuDevice, err = dh.coreProxy.ChildDeviceDetected(log.WithSpanFromContext(context.TODO(), ctx), dh.device.Id, int(parentPortNo),
 			"", int(channelID), string(onuDiscInd.SerialNumber.GetVendorId()), sn, int64(onuID)); err != nil {
 			dh.discOnus.Delete(sn)
-			dh.resourceMgr.FreeonuID(ctx, ponintfid, []uint32{onuID}) // NOTE I'm not sure this method is actually cleaning up the right thing
+			dh.resourceMgr[ponintfid].FreeonuID(ctx, ponintfid, []uint32{onuID}) // NOTE I'm not sure this method is actually cleaning up the right thing
 			return olterrors.NewErrAdapter("core-proxy-child-device-detected-failed", log.Fields{
 				"pon-intf-id":   ponintfid,
 				"serial-number": sn}, err)
 		}
 		if err := dh.eventMgr.OnuDiscoveryIndication(ctx, onuDiscInd, dh.device.Id, onuDevice.Id, onuID, sn, time.Now().Unix()); err != nil {
-			logger.Warnw(ctx, "discovery-indication-failed", log.Fields{"error": err})
+			logger.Warnw(ctx, "discovery-indication-failed", log.Fields{"err": err})
 		}
 		logger.Infow(ctx, "onu-child-device-added",
 			log.Fields{"onuDevice": onuDevice,
@@ -1341,7 +1356,7 @@
 	}
 	if onuInd.OperState == "down" && onuInd.FailReason != oop.OnuIndication_ONU_ACTIVATION_FAIL_REASON_NONE {
 		if err := dh.eventMgr.onuActivationIndication(ctx, onuActivationFailEvent, onuInd, dh.device.Id, time.Now().Unix()); err != nil {
-			logger.Warnw(ctx, "onu-activation-indication-reporting-failed", log.Fields{"error": err})
+			logger.Warnw(ctx, "onu-activation-indication-reporting-failed", log.Fields{"err": err})
 		}
 	}
 	if err := dh.updateOnuStates(ctx, onuDevice, onuInd); err != nil {
@@ -1614,7 +1629,7 @@
 	//get the child device for the parent device
 	onuDevices, err := dh.coreProxy.GetChildDevices(log.WithSpanFromContext(context.TODO(), ctx), dh.device.Id)
 	if err != nil {
-		logger.Errorw(ctx, "failed-to-get-child-devices-information", log.Fields{"device-id": dh.device.Id, "error": err})
+		logger.Errorw(ctx, "failed-to-get-child-devices-information", log.Fields{"device-id": dh.device.Id, "err": err})
 	}
 	if onuDevices != nil {
 		for _, onuDevice := range onuDevices.Items {
@@ -1679,57 +1694,29 @@
 			logger.Debugw(ctx, "failed-to-remove-tech-profile-instance-for-onu", log.Fields{"onu-id": onu.OnuID})
 		}
 		logger.Debugw(ctx, "deleted-tech-profile-instance-for-onu", log.Fields{"onu-id": onu.OnuID})
-		tpIDList := dh.resourceMgr.GetTechProfileIDForOnu(ctx, onu.IntfID, onu.OnuID, uniID)
+		tpIDList := dh.resourceMgr[onu.IntfID].GetTechProfileIDForOnu(ctx, onu.IntfID, onu.OnuID, uniID)
 		for _, tpID := range tpIDList {
-			if err = dh.resourceMgr.RemoveMeterInfoForOnu(ctx, "upstream", onu.IntfID, onu.OnuID, uniID, tpID); err != nil {
+			if err = dh.resourceMgr[onu.IntfID].RemoveMeterInfoForOnu(ctx, "upstream", onu.IntfID, onu.OnuID, uniID, tpID); err != nil {
 				logger.Debugw(ctx, "failed-to-remove-meter-id-for-onu-upstream", log.Fields{"onu-id": onu.OnuID})
 			}
 			logger.Debugw(ctx, "removed-meter-id-for-onu-upstream", log.Fields{"onu-id": onu.OnuID})
-			if err = dh.resourceMgr.RemoveMeterInfoForOnu(ctx, "downstream", onu.IntfID, onu.OnuID, uniID, tpID); err != nil {
+			if err = dh.resourceMgr[onu.IntfID].RemoveMeterInfoForOnu(ctx, "downstream", onu.IntfID, onu.OnuID, uniID, tpID); err != nil {
 				logger.Debugw(ctx, "failed-to-remove-meter-id-for-onu-downstream", log.Fields{"onu-id": onu.OnuID})
 			}
 			logger.Debugw(ctx, "removed-meter-id-for-onu-downstream", log.Fields{"onu-id": onu.OnuID})
 		}
-		dh.resourceMgr.FreePONResourcesForONU(ctx, onu.IntfID, onu.OnuID, uniID)
-		if err = dh.resourceMgr.RemoveTechProfileIDsForOnu(ctx, onu.IntfID, onu.OnuID, uniID); err != nil {
+		dh.resourceMgr[onu.IntfID].FreePONResourcesForONU(ctx, onu.IntfID, onu.OnuID, uniID)
+		if err = dh.resourceMgr[onu.IntfID].RemoveTechProfileIDsForOnu(ctx, onu.IntfID, onu.OnuID, uniID); err != nil {
 			logger.Debugw(ctx, "failed-to-remove-tech-profile-id-for-onu", log.Fields{"onu-id": onu.OnuID})
 		}
 		logger.Debugw(ctx, "removed-tech-profile-id-for-onu", log.Fields{"onu-id": onu.OnuID})
-		if err = dh.resourceMgr.DeletePacketInGemPortForOnu(ctx, onu.IntfID, onu.OnuID, port); err != nil {
+		if err = dh.resourceMgr[onu.IntfID].DeletePacketInGemPortForOnu(ctx, onu.IntfID, onu.OnuID, port); err != nil {
 			logger.Debugw(ctx, "failed-to-remove-gemport-pkt-in", log.Fields{"intfid": onu.IntfID, "onuid": onu.OnuID, "uniId": uniID})
 		}
-		if err = dh.resourceMgr.RemoveAllFlowsForIntfOnuUniKey(ctx, onu.IntfID, int32(onu.OnuID), int32(uniID)); err != nil {
-			logger.Debugw(ctx, "failed-to-remove-flow-for", log.Fields{"intfid": onu.IntfID, "onuid": onu.OnuID, "uniId": uniID})
-		}
 	}
 	return nil
 }
 
-func (dh *DeviceHandler) clearNNIData(ctx context.Context) error {
-	nniUniID := -1
-	nniOnuID := -1
-
-	if dh.resourceMgr == nil {
-		return olterrors.NewErrNotFound("resource-manager", log.Fields{"device-id": dh.device.Id}, nil)
-	}
-	//Free the flow-ids for the NNI port
-	nni, err := dh.resourceMgr.GetNNIFromKVStore(ctx)
-	if err != nil {
-		return olterrors.NewErrPersistence("get", "nni", 0, nil, err)
-	}
-	logger.Debugw(ctx, "nni-", log.Fields{"nni": nni})
-	for _, nniIntfID := range nni {
-		dh.resourceMgr.RemoveResourceMap(ctx, nniIntfID, int32(nniOnuID), int32(nniUniID))
-		_ = dh.resourceMgr.RemoveAllFlowsForIntfOnuUniKey(ctx, nniIntfID, -1, -1)
-
-	}
-	if err = dh.resourceMgr.DelNNiFromKVStore(ctx); err != nil {
-		return olterrors.NewErrPersistence("clear", "nni", 0, nil, err)
-	}
-
-	return nil
-}
-
 // DeleteDevice deletes the device instance from openolt handler array.  Also clears allocated resource manager resources.  Also reboots the OLT hardware!
 func (dh *DeviceHandler) DeleteDevice(ctx context.Context, device *voltha.Device) error {
 	logger.Debug(ctx, "function-entry-delete-device")
@@ -1767,13 +1754,8 @@
 	if dh.resourceMgr != nil {
 		var ponPort uint32
 		for ponPort = 0; ponPort < dh.totalPonPorts; ponPort++ {
-			var onuGemData []rsrcMgr.OnuGemInfo
-			err := dh.resourceMgr.ResourceMgrs[ponPort].GetOnuGemInfo(ctx, ponPort, &onuGemData)
-			if err != nil {
-				_ = olterrors.NewErrNotFound("onu", log.Fields{
-					"device-id": dh.device.Id,
-					"pon-port":  ponPort}, err).Log()
-			}
+			var err error
+			onuGemData := dh.flowMgr[ponPort].getOnuGemInfoList()
 			for i, onu := range onuGemData {
 				onuID := make([]uint32, 1)
 				logger.Debugw(ctx, "onu-data", log.Fields{"onu": onu})
@@ -1782,31 +1764,22 @@
 				}
 				// Clear flowids for gem cache.
 				for _, gem := range onu.GemPorts {
-					dh.resourceMgr.DeleteFlowIDsForGem(ctx, ponPort, gem)
+					dh.resourceMgr[ponPort].DeleteFlowIDsForGem(ctx, ponPort, gem)
 				}
 				onuID[0] = onu.OnuID
-				dh.resourceMgr.FreeonuID(ctx, ponPort, onuID)
+				dh.resourceMgr[ponPort].FreeonuID(ctx, ponPort, onuID)
+				err = dh.resourceMgr[ponPort].DelOnuGemInfo(ctx, ponPort, onu.OnuID)
+				if err != nil {
+					logger.Errorw(ctx, "failed-to-update-onugem-info", log.Fields{"intfid": ponPort, "onugeminfo": onuGemData})
+				}
 			}
-			dh.resourceMgr.DeleteIntfIDGempMapPath(ctx, ponPort)
-			onuGemData = nil
-			err = dh.resourceMgr.DelOnuGemInfoForIntf(ctx, ponPort)
-			if err != nil {
-				logger.Errorw(ctx, "failed-to-update-onugem-info", log.Fields{"intfid": ponPort, "onugeminfo": onuGemData})
-			}
+			/* Clear the resource pool for each PON port in the background */
+			go func(ponPort uint32) {
+				if err := dh.resourceMgr[ponPort].Delete(ctx, ponPort); err != nil {
+					logger.Debug(ctx, err)
+				}
+			}(ponPort)
 		}
-		/* Clear the flows from KV store associated with NNI port.
-		   There are mostly trap rules from NNI port (like LLDP)
-		*/
-		if err := dh.clearNNIData(ctx); err != nil {
-			logger.Errorw(ctx, "failed-to-clear-data-for-NNI-port", log.Fields{"device-id": dh.device.Id})
-		}
-
-		/* Clear the resource pool for each PON port in the background */
-		go func() {
-			if err := dh.resourceMgr.Delete(ctx); err != nil {
-				logger.Debug(ctx, err)
-			}
-		}()
 	}
 
 	/*Delete ONU map for the device*/
@@ -2190,56 +2163,48 @@
 	}
 
 	onu := &oop.Onu{IntfId: intfID, OnuId: onuID, SerialNumber: sn}
+	//clear PON resources associated with ONU
+	onuGem, err := dh.resourceMgr[intfID].GetOnuGemInfo(ctx, intfID, onuID)
+	if err != nil || onuGem == nil || onuGem.OnuID != onuID {
+		logger.Warnw(ctx, "failed-to-get-onu-info-for-pon-port", log.Fields{
+			"device-id": dh.device.Id,
+			"intf-id":   intfID,
+			"onuID":     onuID,
+			"err":       err})
+	} else {
+		logger.Debugw(ctx, "onu-data", log.Fields{"onu": onu})
+		if err := dh.clearUNIData(ctx, onuGem); err != nil {
+			logger.Warnw(ctx, "failed-to-clear-uni-data-for-onu", log.Fields{
+				"device-id":  dh.device.Id,
+				"onu-device": onu,
+				"err":        err})
+		}
+		// Clear flowids for gem cache.
+		for _, gem := range onuGem.GemPorts {
+			dh.resourceMgr[intfID].DeleteFlowIDsForGem(ctx, intfID, gem)
+		}
+		err := dh.resourceMgr[intfID].DelOnuGemInfo(ctx, intfID, onuID)
+		if err != nil {
+			logger.Warnw(ctx, "persistence-update-onu-gem-info-failed", log.Fields{
+				"intf-id":    intfID,
+				"onu-device": onu,
+				"onu-gem":    onuGem,
+				"err":        err})
+			//Not returning error on cleanup.
+		}
+		logger.Debugw(ctx, "removed-onu-gem-info", log.Fields{"intf": intfID, "onu-device": onu, "onugem": onuGem})
+		dh.resourceMgr[intfID].FreeonuID(ctx, intfID, []uint32{onuGem.OnuID})
+	}
+	dh.onus.Delete(onuKey)
+	dh.discOnus.Delete(onuSn)
+
+	// Now clear the ONU on the OLT
 	if _, err := dh.Client.DeleteOnu(log.WithSpanFromContext(context.Background(), ctx), onu); err != nil {
 		return olterrors.NewErrAdapter("failed-to-delete-onu", log.Fields{
 			"device-id": dh.device.Id,
 			"onu-id":    onuID}, err).Log()
 	}
-	//clear PON resources associated with ONU
-	var onuGemData []rsrcMgr.OnuGemInfo
-	if onuMgr, ok := dh.resourceMgr.ResourceMgrs[intfID]; !ok {
-		logger.Warnw(ctx, "failed-to-get-resource-manager-for-interface-Id", log.Fields{
-			"device-id": dh.device.Id,
-			"intf-id":   intfID})
-	} else {
-		if err := onuMgr.GetOnuGemInfo(ctx, intfID, &onuGemData); err != nil {
-			logger.Warnw(ctx, "failed-to-get-onu-info-for-pon-port", log.Fields{
-				"device-id": dh.device.Id,
-				"intf-id":   intfID,
-				"error":     err})
-		} else {
-			for i, onu := range onuGemData {
-				if onu.OnuID == onuID && onu.SerialNumber == onuSn {
-					logger.Debugw(ctx, "onu-data", log.Fields{"onu": onu})
-					if err := dh.clearUNIData(ctx, &onuGemData[i]); err != nil {
-						logger.Warnw(ctx, "failed-to-clear-uni-data-for-onu", log.Fields{
-							"device-id":  dh.device.Id,
-							"onu-device": onu,
-							"error":      err})
-					}
-					// Clear flowids for gem cache.
-					for _, gem := range onu.GemPorts {
-						dh.resourceMgr.DeleteFlowIDsForGem(ctx, intfID, gem)
-					}
-					onuGemData = append(onuGemData[:i], onuGemData[i+1:]...)
-					err := onuMgr.AddOnuGemInfo(ctx, intfID, onuGemData)
-					if err != nil {
-						logger.Warnw(ctx, "persistence-update-onu-gem-info-failed", log.Fields{
-							"intf-id":    intfID,
-							"onu-device": onu,
-							"onu-gem":    onuGemData,
-							"error":      err})
-						//Not returning error on cleanup.
-					}
-					logger.Debugw(ctx, "removed-onu-gem-info", log.Fields{"intf": intfID, "onu-device": onu, "onugem": onuGemData})
-					dh.resourceMgr.FreeonuID(ctx, intfID, []uint32{onu.OnuID})
-					break
-				}
-			}
-		}
-	}
-	dh.onus.Delete(onuKey)
-	dh.discOnus.Delete(onuSn)
+
 	return nil
 }
 
@@ -2334,7 +2299,7 @@
 	/*
 		resp, err = dh.Client.GetValue(ctx, valueparam)
 		if err != nil {
-			logger.Errorw("error-while-getValue", log.Fields{"DeviceID": dh.device, "onu-id": onuid, "error": err})
+			logger.Errorw("error-while-getValue", log.Fields{"DeviceID": dh.device, "onu-id": onuid, "err": err})
 			return nil, err
 		}
 	*/
@@ -2429,6 +2394,7 @@
 	// Step2 : Push the McastFlowOrGroupControlBlock to appropriate channel
 	// Step3 : Wait on response channel for response
 	// Step4 : Return error value
+	startTime := time.Now()
 	logger.Debugw(ctx, "process-flow-or-group", log.Fields{"flow": flow, "group": group, "action": action})
 	errChan := make(chan error)
 	var groupID uint32
@@ -2451,7 +2417,7 @@
 	dh.incomingMcastFlowOrGroup[groupID%MaxNumOfGroupHandlerChannels] <- mcastFlowOrGroupCb
 	// Wait for handler to return error value
 	err := <-errChan
-	logger.Debugw(ctx, "process-flow-or-group--received-resp", log.Fields{"flow": flow, "group": group, "action": action, "err": err})
+	logger.Debugw(ctx, "process-flow-or-group--received-resp", log.Fields{"err": err, "totalTimeInSeconds": time.Since(startTime).Milliseconds()})
 	return err
 }
 
diff --git a/internal/pkg/core/device_handler_test.go b/internal/pkg/core/device_handler_test.go
index 1cae8b6..d69be1a 100644
--- a/internal/pkg/core/device_handler_test.go
+++ b/internal/pkg/core/device_handler_test.go
@@ -19,8 +19,7 @@
 
 import (
 	"context"
-	conf "github.com/opencord/voltha-lib-go/v4/pkg/config"
-	tp "github.com/opencord/voltha-lib-go/v4/pkg/techprofile"
+	conf "github.com/opencord/voltha-lib-go/v5/pkg/config"
 	"net"
 	"reflect"
 	"sync"
@@ -29,11 +28,11 @@
 
 	"github.com/golang/protobuf/ptypes"
 	"github.com/golang/protobuf/ptypes/any"
-	"github.com/opencord/voltha-lib-go/v4/pkg/db"
-	fu "github.com/opencord/voltha-lib-go/v4/pkg/flows"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
-	"github.com/opencord/voltha-lib-go/v4/pkg/pmmetrics"
-	ponrmgr "github.com/opencord/voltha-lib-go/v4/pkg/ponresourcemanager"
+	"github.com/opencord/voltha-lib-go/v5/pkg/db"
+	fu "github.com/opencord/voltha-lib-go/v5/pkg/flows"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/pmmetrics"
+	ponrmgr "github.com/opencord/voltha-lib-go/v5/pkg/ponresourcemanager"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/config"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/resourcemanager"
@@ -169,16 +168,17 @@
 	}}
 
 	deviceInf := &oop.DeviceInfo{Vendor: "openolt", Ranges: oopRanges, Model: "openolt", DeviceId: dh.device.Id, PonPorts: NumPonPorts}
-	rsrMgr := resourcemanager.OpenOltResourceMgr{DeviceID: dh.device.Id, DeviceType: dh.device.Type, DevInfo: deviceInf,
-		KVStore: &db.Backend{
-			Client: &mocks.MockKVClient{},
-		}}
-	rsrMgr.AllocIDMgmtLock = make([]sync.RWMutex, deviceInf.PonPorts)
-	rsrMgr.GemPortIDMgmtLock = make([]sync.RWMutex, deviceInf.PonPorts)
-	rsrMgr.OnuIDMgmtLock = make([]sync.RWMutex, deviceInf.PonPorts)
+	dh.deviceInfo = deviceInf
+	dh.resourceMgr = make([]*resourcemanager.OpenOltResourceMgr, deviceInf.PonPorts)
+	var i uint32
+	for i = 0; i < deviceInf.PonPorts; i++ {
+		dh.resourceMgr[i] = &resourcemanager.OpenOltResourceMgr{DeviceID: dh.device.Id, DeviceType: dh.device.Type, DevInfo: deviceInf,
+			KVStore: &db.Backend{
+				Client: &mocks.MockKVClient{},
+			}}
+		dh.resourceMgr[i].InitLocalCache()
+	}
 
-	dh.resourceMgr = &rsrMgr
-	dh.resourceMgr.ResourceMgrs = make(map[uint32]*ponrmgr.PONResourceManager)
 	ranges := make(map[string]interface{})
 	sharedIdxByType := make(map[string]string)
 	sharedIdxByType["ALLOC_ID"] = "ALLOC_ID"
@@ -195,13 +195,6 @@
 	ranges["flow_id_shared"] = uint32(0)
 
 	ponmgr := &ponrmgr.PONResourceManager{}
-
-	ctx := context.TODO()
-	tpMgr, err := tp.NewTechProfile(ctx, ponmgr, "etcd", "127.0.0.1", "/")
-	if err != nil {
-		logger.Fatal(ctx, err.Error())
-	}
-
 	ponmgr.DeviceID = "onu-1"
 	ponmgr.IntfIDs = []uint32{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
 	ponmgr.KVStore = &db.Backend{
@@ -209,19 +202,28 @@
 	}
 	ponmgr.PonResourceRanges = ranges
 	ponmgr.SharedIdxByType = sharedIdxByType
+	ponmgr.Technology = "XGS-PON"
+	for i = 0; i < deviceInf.PonPorts; i++ {
+		dh.resourceMgr[i].PonRsrMgr = ponmgr
+	}
+
+	/*
+		tpMgr, err := tp.NewTechProfile(ctx, ponmgr, "etcd", "127.0.0.1", "/")
+		if err != nil {
+			logger.Fatal(ctx, err.Error())
+		}
+	*/
+	tpMgr := &mocks.MockTechProfile{TpID: 64}
 	ponmgr.TechProfileMgr = tpMgr
 
-	for i := 0; i < NumPonPorts; i++ {
-		dh.resourceMgr.ResourceMgrs[uint32(i)] = ponmgr
-	}
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
-	dh.groupMgr = NewGroupManager(ctx, dh, dh.resourceMgr)
+	dh.groupMgr = NewGroupManager(ctx, dh, dh.resourceMgr[0])
 	dh.totalPonPorts = NumPonPorts
 	dh.flowMgr = make([]*OpenOltFlowMgr, dh.totalPonPorts)
-	for i := 0; i < int(dh.totalPonPorts); i++ {
+	for i = 0; i < dh.totalPonPorts; i++ {
 		// Instantiate flow manager
-		if dh.flowMgr[i] = NewFlowManager(ctx, dh, dh.resourceMgr, dh.groupMgr, uint32(i)); dh.flowMgr[i] == nil {
+		if dh.flowMgr[i] = NewFlowManager(ctx, dh, dh.resourceMgr[i], dh.groupMgr, uint32(i)); dh.flowMgr[i] == nil {
 			return nil
 		}
 	}
@@ -443,18 +445,18 @@
 	var err error
 
 	if marshalledData, err = ptypes.MarshalAny(body); err != nil {
-		logger.Errorw(ctx, "cannot-marshal-request", log.Fields{"error": err})
+		logger.Errorw(ctx, "cannot-marshal-request", log.Fields{"err": err})
 	}
 
 	var marshalledData1 *any.Any
 
 	if marshalledData1, err = ptypes.MarshalAny(body2); err != nil {
-		logger.Errorw(ctx, "cannot-marshal-request", log.Fields{"error": err})
+		logger.Errorw(ctx, "cannot-marshal-request", log.Fields{"err": err})
 	}
 	var marshalledData2 *any.Any
 
 	if marshalledData2, err = ptypes.MarshalAny(body3); err != nil {
-		logger.Errorw(ctx, "cannot-marshal-request", log.Fields{"error": err})
+		logger.Errorw(ctx, "cannot-marshal-request", log.Fields{"err": err})
 	}
 	type args struct {
 		msg *ic.InterAdapterMessage
diff --git a/internal/pkg/core/olt_platform.go b/internal/pkg/core/olt_platform.go
index b85dd4b..9526ee7 100644
--- a/internal/pkg/core/olt_platform.go
+++ b/internal/pkg/core/olt_platform.go
@@ -20,8 +20,8 @@
 import (
 	"context"
 
-	"github.com/opencord/voltha-lib-go/v4/pkg/flows"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/flows"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
 	ofp "github.com/opencord/voltha-protos/v4/go/openflow_13"
 	"github.com/opencord/voltha-protos/v4/go/voltha"
@@ -112,6 +112,10 @@
 	minNniIntPortNum = (1 << bitsforNNIID)
 	// maxNniPortNum is used to store the maximum range of nni port number ((1 << 21)-1) 2097151
 	maxNniPortNum = ((1 << (bitsforNNIID + 1)) - 1)
+	// minPonIntfPortNum stores the minimum pon port number
+	minPonIntfPortNum = ponIntfMarkerValue << ponIntfMarkerPos
+	// maxPonIntfPortNum stores the maximum pon port number
+	maxPonIntfPortNum = (ponIntfMarkerValue << ponIntfMarkerPos) | (2 ^ bitsForPONID - 1)
 )
 
 //MinUpstreamPortID value
@@ -177,6 +181,15 @@
 	return (portNum & 0xFFFF), nil
 }
 
+//IntfIDFromPonPortNum returns Intf ID derived from portNum
+func IntfIDFromPonPortNum(ctx context.Context, portNum uint32) (uint32, error) {
+	if portNum < minPonIntfPortNum || portNum > maxPonIntfPortNum {
+		logger.Errorw(ctx, "ponportnumber-is-not-in-valid-range", log.Fields{"portnum": portNum})
+		return uint32(0), olterrors.ErrInvalidPortRange
+	}
+	return (portNum & 0x7FFF), nil
+}
+
 //IntfIDToPortTypeName returns port type derived from the intfId
 func IntfIDToPortTypeName(intfID uint32) voltha.Port_PortType {
 	if ((ponIntfMarkerValue << ponIntfMarkerPos) ^ intfID) < MaxPonsPerOlt {
diff --git a/internal/pkg/core/olt_platform_test.go b/internal/pkg/core/olt_platform_test.go
index 4c89eaa..6ff32db 100644
--- a/internal/pkg/core/olt_platform_test.go
+++ b/internal/pkg/core/olt_platform_test.go
@@ -19,7 +19,7 @@
 
 import (
 	"context"
-	fu "github.com/opencord/voltha-lib-go/v4/pkg/flows"
+	fu "github.com/opencord/voltha-lib-go/v5/pkg/flows"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
 	ofp "github.com/opencord/voltha-protos/v4/go/openflow_13"
 	"github.com/opencord/voltha-protos/v4/go/voltha"
diff --git a/internal/pkg/core/olt_state_transitions.go b/internal/pkg/core/olt_state_transitions.go
index e67bd43..5fab1d5 100644
--- a/internal/pkg/core/olt_state_transitions.go
+++ b/internal/pkg/core/olt_state_transitions.go
@@ -22,7 +22,7 @@
 	"reflect"
 	"runtime"
 
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 )
 
 // DeviceState OLT Device state
diff --git a/internal/pkg/core/openolt.go b/internal/pkg/core/openolt.go
index 436d67a..33b3f1b 100644
--- a/internal/pkg/core/openolt.go
+++ b/internal/pkg/core/openolt.go
@@ -22,11 +22,11 @@
 	"sync"
 	"time"
 
-	"github.com/opencord/voltha-lib-go/v4/pkg/adapters/adapterif"
-	conf "github.com/opencord/voltha-lib-go/v4/pkg/config"
-	"github.com/opencord/voltha-lib-go/v4/pkg/events/eventif"
-	"github.com/opencord/voltha-lib-go/v4/pkg/kafka"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/adapters/adapterif"
+	conf "github.com/opencord/voltha-lib-go/v5/pkg/config"
+	"github.com/opencord/voltha-lib-go/v5/pkg/events/eventif"
+	"github.com/opencord/voltha-lib-go/v5/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/config"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
 	"github.com/opencord/voltha-protos/v4/go/extension"
@@ -159,6 +159,20 @@
 	return olterrors.NewErrNotFound("device-handler", log.Fields{"device-id": targetDevice}, nil)
 }
 
+//Process_tech_profile_instance_request processes tech profile request message from onu adapter
+func (oo *OpenOLT) Process_tech_profile_instance_request(ctx context.Context, msg *ic.InterAdapterTechProfileInstanceRequestMessage) *ic.InterAdapterTechProfileDownloadMessage {
+	logger.Debugw(ctx, "Process_tech_profile_instance_request", log.Fields{"tpPath": msg.TpInstancePath})
+	targetDeviceID := msg.ParentDeviceId // Request?
+	if targetDeviceID == "" {
+		logger.Error(ctx, "device-id-nil")
+		return nil
+	}
+	if handler := oo.getDeviceHandler(targetDeviceID); handler != nil {
+		return handler.GetInterAdapterTechProfileDownloadMessage(ctx, msg.TpInstancePath, msg.ParentPonPort, msg.OnuId, msg.UniId)
+	}
+	return nil
+}
+
 //Adapter_descriptor not implemented
 func (oo *OpenOLT) Adapter_descriptor(ctx context.Context) error {
 	return olterrors.ErrNotImplemented
@@ -407,7 +421,7 @@
 	if handler := oo.getDeviceHandler(deviceID); handler != nil {
 		if resp, err = handler.getExtValue(ctx, device, valueparam); err != nil {
 			logger.Errorw(ctx, "error-occurred-during-get-ext-value", log.Fields{"device-id": deviceID, "onu-id": device.Id,
-				"error": err})
+				"err": err})
 			return nil, err
 		}
 	}
diff --git a/internal/pkg/core/openolt_eventmgr.go b/internal/pkg/core/openolt_eventmgr.go
index 336592c..1b5abd1 100644
--- a/internal/pkg/core/openolt_eventmgr.go
+++ b/internal/pkg/core/openolt_eventmgr.go
@@ -23,8 +23,8 @@
 	"fmt"
 	"strconv"
 
-	"github.com/opencord/voltha-lib-go/v4/pkg/events/eventif"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/events/eventif"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
 	"github.com/opencord/voltha-protos/v4/go/common"
 	oop "github.com/opencord/voltha-protos/v4/go/openolt"
@@ -660,7 +660,7 @@
 func (em *OpenOltEventMgr) oltIntfOperIndication(ctx context.Context, ifindication *oop.IntfOperIndication, deviceID string, raisedTs int64) {
 	portNo := IntfIDToPortNo(ifindication.IntfId, voltha.Port_PON_OLT)
 	if port, err := em.handler.coreProxy.GetDevicePort(ctx, deviceID, portNo); err != nil {
-		logger.Warnw(ctx, "Error while fetching port object", log.Fields{"device-id": deviceID, "error": err})
+		logger.Warnw(ctx, "Error while fetching port object", log.Fields{"device-id": deviceID, "err": err})
 	} else if port.AdminState != common.AdminState_ENABLED {
 		logger.Debugw(ctx, "port-disable/enable-event-not-generated--the-port-is-not-enabled-by-operator", log.Fields{"device-id": deviceID, "port": port})
 		return
diff --git a/internal/pkg/core/openolt_flowmgr.go b/internal/pkg/core/openolt_flowmgr.go
index 4ae86ac..9c1cb09 100644
--- a/internal/pkg/core/openolt_flowmgr.go
+++ b/internal/pkg/core/openolt_flowmgr.go
@@ -22,14 +22,15 @@
 	"encoding/hex"
 	"errors"
 	"fmt"
-	"github.com/opencord/voltha-lib-go/v4/pkg/meters"
+	"github.com/opencord/voltha-lib-go/v5/pkg/meters"
 	"strconv"
 	"strings"
 	"sync"
+	"time"
 
-	"github.com/opencord/voltha-lib-go/v4/pkg/flows"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
-	tp "github.com/opencord/voltha-lib-go/v4/pkg/techprofile"
+	"github.com/opencord/voltha-lib-go/v5/pkg/flows"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
+	tp "github.com/opencord/voltha-lib-go/v5/pkg/techprofile"
 	rsrcMgr "github.com/opencord/voltha-openolt-adapter/internal/pkg/resourcemanager"
 	"github.com/opencord/voltha-protos/v4/go/common"
 	ic "github.com/opencord/voltha-protos/v4/go/inter_container"
@@ -154,11 +155,6 @@
 	pbit1        = '1'
 )
 
-type gemPortKey struct {
-	intfID  uint32
-	gemPort uint32
-}
-
 type schedQueue struct {
 	direction    tp_pb.Direction
 	intfID       uint32
@@ -186,15 +182,6 @@
 	gemToAes    map[uint32]bool
 }
 
-// subscriberDataPathFlowIDKey is key to subscriberDataPathFlowIDMap map
-type subscriberDataPathFlowIDKey struct {
-	intfID    uint32
-	onuID     uint32
-	uniID     uint32
-	direction string
-	tpID      uint32
-}
-
 // This control block is created per flow add/remove and pushed on the incomingFlows channel slice
 // The flowControlBlock is then picked by the perOnuFlowHandlerRoutine for further processing.
 // There is on perOnuFlowHandlerRoutine routine per ONU that constantly monitors for any incoming
@@ -210,37 +197,28 @@
 //OpenOltFlowMgr creates the Structure of OpenOltFlowMgr obj
 type OpenOltFlowMgr struct {
 	ponPortIdx    uint32 // Pon Port this FlowManager is responsible for
-	techprofile   map[uint32]tp.TechProfileIf
+	techprofile   tp.TechProfileIf
 	deviceHandler *DeviceHandler
 	grpMgr        *OpenOltGroupMgr
 	resourceMgr   *rsrcMgr.OpenOltResourceMgr
 
-	onuIdsLock sync.RWMutex // TODO: Do we need this?
-
-	flowsUsedByGemPort    map[uint32][]uint64 // gem port id to flow ids
-	flowsUsedByGemPortKey sync.RWMutex        // lock to be used to access the flowsUsedByGemPort map
+	gemToFlowIDs    map[uint32][]uint64 // gem port id to flow ids
+	gemToFlowIDsKey sync.RWMutex        // lock to be used to access the gemToFlowIDs map
 
 	packetInGemPort     map[rsrcMgr.PacketInInfoKey]uint32 //packet in gem port local cache
 	packetInGemPortLock sync.RWMutex
 
 	// TODO create a type rsrcMgr.OnuGemInfos to be used instead of []rsrcMgr.OnuGemInfo
-	onuGemInfo []rsrcMgr.OnuGemInfo //onu, gem and uni info local cache
+	onuGemInfoMap map[uint32]*rsrcMgr.OnuGemInfo //onu, gem and uni info local cache -> map of onuID to OnuGemInfo
 	// We need to have a global lock on the onuGemInfo map
 	onuGemInfoLock sync.RWMutex
 
-	// Map of voltha flowID associated with subscriberDataPathFlowIDKey
-	// This information is not persisted on Kv store and hence should be reconciled on adapter restart
-	subscriberDataPathFlowIDMap     map[subscriberDataPathFlowIDKey]uint64
-	subscriberDataPathFlowIDMapLock sync.RWMutex
+	flowIDToGems     map[uint64][]uint32
+	flowIDToGemsLock sync.RWMutex
 
 	// Slice of channels. Each channel in slice, index by ONU ID, queues flows per ONU.
 	// A go routine per ONU, waits on the unique channel (indexed by ONU ID) for incoming flows (add/remove)
 	incomingFlows []chan flowControlBlock
-
-	//this map keeps uni port info by gem and pon port. This relation shall be used for packet-out operations
-	gemToUniMap map[gemPortKey][]uint32
-	//We need to have a global lock on the gemToUniLock map
-	gemToUniLock sync.RWMutex
 }
 
 //NewFlowManager creates OpenOltFlowMgr object and initializes the parameters
@@ -248,23 +226,18 @@
 	logger.Infow(ctx, "initializing-flow-manager", log.Fields{"device-id": dh.device.Id})
 	var flowMgr OpenOltFlowMgr
 	var err error
-	var idx uint32
 
 	flowMgr.deviceHandler = dh
+	flowMgr.ponPortIdx = ponPortIdx
 	flowMgr.grpMgr = grpMgr
 	flowMgr.resourceMgr = rMgr
-	flowMgr.techprofile = make(map[uint32]tp.TechProfileIf)
 	if err = flowMgr.populateTechProfilePerPonPort(ctx); err != nil {
-		logger.Errorw(ctx, "error-while-populating-tech-profile-mgr", log.Fields{"error": err})
+		logger.Errorw(ctx, "error-while-populating-tech-profile-mgr", log.Fields{"err": err})
 		return nil
 	}
-	flowMgr.onuIdsLock = sync.RWMutex{}
-	flowMgr.flowsUsedByGemPort = make(map[uint32][]uint64)
+	flowMgr.gemToFlowIDs = make(map[uint32][]uint64)
 	flowMgr.packetInGemPort = make(map[rsrcMgr.PacketInInfoKey]uint32)
-	flowMgr.packetInGemPortLock = sync.RWMutex{}
-	flowMgr.onuGemInfoLock = sync.RWMutex{}
-	flowMgr.subscriberDataPathFlowIDMap = make(map[subscriberDataPathFlowIDKey]uint64)
-	flowMgr.subscriberDataPathFlowIDMapLock = sync.RWMutex{}
+	flowMgr.flowIDToGems = make(map[uint64][]uint32)
 
 	// Create a slice of buffered channels for handling concurrent flows per ONU.
 	// The additional entry (+1) is to handle the NNI trap flows on a separate channel from individual ONUs channel
@@ -276,54 +249,35 @@
 		// This routine will be blocked on the flowMgr.incomingFlows[onu-id] channel for incoming flows.
 		go flowMgr.perOnuFlowHandlerRoutine(flowMgr.incomingFlows[i])
 	}
-
+	flowMgr.onuGemInfoMap = make(map[uint32]*rsrcMgr.OnuGemInfo)
 	//Load the onugem info cache from kv store on flowmanager start
-	if flowMgr.onuGemInfo, err = rMgr.GetOnuGemInfo(ctx, ponPortIdx); err != nil {
-		logger.Error(ctx, "failed-to-load-onu-gem-info-cache")
+	onuIDStart := flowMgr.deviceHandler.deviceInfo.OnuIdStart
+	onuIDEnd := flowMgr.deviceHandler.deviceInfo.OnuIdEnd
+	for onuID := onuIDStart; onuID <= onuIDEnd; onuID++ {
+		// check for a valid serial number in onuGem as GetOnuGemInfo can return nil error in case of nothing found in the path.
+		onugem, err := rMgr.GetOnuGemInfo(ctx, onuID, ponPortIdx)
+		if err == nil && onugem != nil && onugem.SerialNumber != "" {
+			flowMgr.onuGemInfoMap[onuID] = onugem
+		}
 	}
-	//Load flowID list per gem map per interface from the kvstore.
-	flowMgr.loadFlowIDlistForGem(ctx, idx)
+
+	//Load flowID list per gem map And gemIDs per flow per interface from the kvstore.
+	flowMgr.loadFlowIDsForGemAndGemIDsForFlow(ctx)
+
 	//load interface to multicast queue map from kv store
-
-	flowMgr.gemToUniMap = make(map[gemPortKey][]uint32)
-	flowMgr.gemToUniLock = sync.RWMutex{}
-
 	flowMgr.grpMgr.LoadInterfaceToMulticastQueueMap(ctx)
-	flowMgr.reconcileSubscriberDataPathFlowIDMap(ctx)
 	logger.Info(ctx, "initialization-of-flow-manager-success")
 	return &flowMgr
 }
 
-// toGemToUniMap adds uni info consisting of onu and uni ID to the map and associates it with a gem port
-func (f *OpenOltFlowMgr) toGemToUniMap(ctx context.Context, gemPK gemPortKey, onuID uint32, uniID uint32) {
-	f.gemToUniLock.Lock()
-	f.gemToUniMap[gemPK] = []uint32{onuID, uniID}
-	f.gemToUniLock.Unlock()
-}
-
-// fromGemToUniMap returns onu and uni ID associated with the given key
-func (f *OpenOltFlowMgr) fromGemToUniMap(key gemPortKey) ([]uint32, bool) {
-	f.gemToUniLock.RLock()
-	defer f.gemToUniLock.RUnlock()
-	val, ok := f.gemToUniMap[key]
-	return val, ok
-}
-
-// removeFromGemToUniMap removes an entry associated with the given key from gemToUniMap
-func (f *OpenOltFlowMgr) removeFromGemToUniMap(key gemPortKey) {
-	f.gemToUniLock.Lock()
-	defer f.gemToUniLock.Unlock()
-	delete(f.gemToUniMap, key)
-}
-
 func (f *OpenOltFlowMgr) registerFlow(ctx context.Context, flowFromCore *ofp.OfpFlowStats, deviceFlow *openoltpb2.Flow) error {
 	if !deviceFlow.ReplicateFlow && deviceFlow.GemportId > 0 {
 		// Flow is not replicated in this case, we need to register the flow for a single gem-port
-		return f.registerFlowIDForGem(ctx, uint32(deviceFlow.AccessIntfId), uint32(deviceFlow.GemportId), flowFromCore)
+		return f.registerFlowIDForGemAndGemIDForFlow(ctx, uint32(deviceFlow.AccessIntfId), uint32(deviceFlow.GemportId), flowFromCore)
 	} else if deviceFlow.ReplicateFlow && len(deviceFlow.PbitToGemport) > 0 {
 		// Flow is replicated in this case. We need to register the flow for all the gem-ports it is replicated to.
 		for _, gemPort := range deviceFlow.PbitToGemport {
-			if err := f.registerFlowIDForGem(ctx, uint32(deviceFlow.AccessIntfId), gemPort, flowFromCore); err != nil {
+			if err := f.registerFlowIDForGemAndGemIDForFlow(ctx, uint32(deviceFlow.AccessIntfId), gemPort, flowFromCore); err != nil {
 				return err
 			}
 		}
@@ -331,15 +285,26 @@
 	return nil
 }
 
-func (f *OpenOltFlowMgr) registerFlowIDForGem(ctx context.Context, accessIntfID uint32, gemPortID uint32, flowFromCore *ofp.OfpFlowStats) error {
-	f.flowsUsedByGemPortKey.Lock()
-	flowIDList, ok := f.flowsUsedByGemPort[gemPortID]
+func (f *OpenOltFlowMgr) registerFlowIDForGemAndGemIDForFlow(ctx context.Context, accessIntfID uint32, gemPortID uint32, flowFromCore *ofp.OfpFlowStats) error {
+	// update gem->flows map
+	f.gemToFlowIDsKey.Lock()
+	flowIDList, ok := f.gemToFlowIDs[gemPortID]
 	if !ok {
 		flowIDList = []uint64{flowFromCore.Id}
+	} else {
+		flowIDList = appendUnique64bit(flowIDList, flowFromCore.Id)
 	}
-	flowIDList = appendUnique64bit(flowIDList, flowFromCore.Id)
-	f.flowsUsedByGemPort[gemPortID] = flowIDList
-	f.flowsUsedByGemPortKey.Unlock()
+	f.gemToFlowIDs[gemPortID] = flowIDList
+	f.gemToFlowIDsKey.Unlock()
+
+	// update flow->gems map
+	f.flowIDToGemsLock.Lock()
+	if _, ok := f.flowIDToGems[flowFromCore.Id]; !ok {
+		f.flowIDToGems[flowFromCore.Id] = []uint32{gemPortID}
+	} else {
+		f.flowIDToGems[flowFromCore.Id] = appendUnique32bit(f.flowIDToGems[flowFromCore.Id], gemPortID)
+	}
+	f.flowIDToGemsLock.Unlock()
 
 	// update the flowids for a gem to the KVstore
 	return f.resourceMgr.UpdateFlowIDsForGem(ctx, accessIntfID, gemPortID, flowIDList)
@@ -452,7 +417,7 @@
 
 	if meterInfo != nil {
 		logger.Debugw(ctx, "scheduler-already-created-for-upstream", log.Fields{"device-id": f.deviceHandler.device.Id, "meter-id": sq.meterID})
-		if meterInfo.MeterConfig.MeterId == sq.meterID {
+		if meterInfo.MeterID == sq.meterID {
 			if err := f.resourceMgr.HandleMeterInfoRefCntUpdate(ctx, Direction, sq.intfID, sq.onuID, sq.uniID, sq.tpID, true); err != nil {
 				return err
 			}
@@ -460,7 +425,7 @@
 		}
 		return olterrors.NewErrInvalidValue(log.Fields{
 			"unsupported":       "meter-id",
-			"kv-store-meter-id": meterInfo.MeterConfig.MeterId,
+			"kv-store-meter-id": meterInfo.MeterID,
 			"meter-id-in-flow":  sq.meterID,
 			"device-id":         f.deviceHandler.device.Id}, nil)
 	}
@@ -472,18 +437,9 @@
 			"device-id": f.deviceHandler.device.Id})
 
 	if sq.direction == tp_pb.Direction_UPSTREAM {
-		SchedCfg, err = f.techprofile[sq.intfID].GetUsScheduler(ctx, sq.tpInst.(*tp.TechProfile))
+		SchedCfg = f.techprofile.GetUsScheduler(sq.tpInst.(*tp_pb.TechProfileInstance))
 	} else if sq.direction == tp_pb.Direction_DOWNSTREAM {
-		SchedCfg, err = f.techprofile[sq.intfID].GetDsScheduler(ctx, sq.tpInst.(*tp.TechProfile))
-	}
-
-	if err != nil {
-		return olterrors.NewErrNotFound("scheduler-config",
-			log.Fields{
-				"intf-id":   sq.intfID,
-				"direction": sq.direction,
-				"tp-inst":   sq.tpInst,
-				"device-id": f.deviceHandler.device.Id}, err)
+		SchedCfg = f.techprofile.GetDsScheduler(sq.tpInst.(*tp_pb.TechProfileInstance))
 	}
 
 	found := false
@@ -491,13 +447,10 @@
 	if sq.flowMetadata != nil {
 		for _, meter := range sq.flowMetadata.Meters {
 			if sq.meterID == meter.MeterId {
-				meterInfo.MeterConfig = ofp.OfpMeterConfig{}
-				meterInfo.MeterConfig.MeterId = meter.MeterId
-				meterInfo.MeterConfig.Flags = meter.Flags
+				meterInfo.MeterID = meter.MeterId
 				meterInfo.RefCnt = 1 // initialize it to 1, since this is the first flow that referenced the meter id.
-				meterInfo.MeterConfig.Bands = append(meterInfo.MeterConfig.Bands, meter.Bands...)
 				logger.Debugw(ctx, "found-meter-config-from-flowmetadata",
-					log.Fields{"meterConfig": meterInfo.MeterConfig,
+					log.Fields{"meter": meter,
 						"device-id": f.deviceHandler.device.Id})
 				found = true
 				break
@@ -515,14 +468,14 @@
 	}
 
 	var TrafficShaping *tp_pb.TrafficShapingInfo
-	if TrafficShaping, err = meters.GetTrafficShapingInfo(ctx, &meterInfo.MeterConfig); err != nil {
+	if TrafficShaping, err = meters.GetTrafficShapingInfo(ctx, sq.flowMetadata.Meters[0]); err != nil {
 		return olterrors.NewErrInvalidValue(log.Fields{
 			"reason":    "invalid-meter-config",
 			"meter-id":  sq.meterID,
 			"device-id": f.deviceHandler.device.Id}, nil)
 	}
 
-	TrafficSched := []*tp_pb.TrafficScheduler{f.techprofile[sq.intfID].GetTrafficScheduler(sq.tpInst.(*tp.TechProfile), SchedCfg, TrafficShaping)}
+	TrafficSched := []*tp_pb.TrafficScheduler{f.techprofile.GetTrafficScheduler(sq.tpInst.(*tp_pb.TechProfileInstance), SchedCfg, TrafficShaping)}
 	TrafficSched[0].TechProfileId = sq.tpID
 
 	if err := f.pushSchedulerQueuesToDevice(ctx, sq, TrafficSched); err != nil {
@@ -549,7 +502,7 @@
 }
 
 func (f *OpenOltFlowMgr) pushSchedulerQueuesToDevice(ctx context.Context, sq schedQueue, TrafficSched []*tp_pb.TrafficScheduler) error {
-	trafficQueues, err := f.techprofile[sq.intfID].GetTrafficQueues(ctx, sq.tpInst.(*tp.TechProfile), sq.direction)
+	trafficQueues, err := f.techprofile.GetTrafficQueues(ctx, sq.tpInst.(*tp_pb.TechProfileInstance), sq.direction)
 
 	if err != nil {
 		return olterrors.NewErrAdapter("unable-to-construct-traffic-queue-configuration",
@@ -598,10 +551,9 @@
 		"device-id":      f.deviceHandler.device.Id})
 
 	if sq.direction == tp_pb.Direction_DOWNSTREAM {
-		multicastTrafficQueues := f.techprofile[sq.intfID].GetMulticastTrafficQueues(ctx, sq.tpInst.(*tp.TechProfile))
+		multicastTrafficQueues := f.techprofile.GetMulticastTrafficQueues(ctx, sq.tpInst.(*tp_pb.TechProfileInstance))
 		if len(multicastTrafficQueues) > 0 {
-			if _, present := f.grpMgr.GetInterfaceToMcastQueueMap(sq.intfID); !present {
-				//assumed that there is only one queue per PON for the multicast service
+			if _, present := f.grpMgr.GetInterfaceToMcastQueueMap(sq.intfID); !present { //assumed that there is only one queue per PON for the multicast service
 				//the default queue with multicastQueuePerPonPort.Priority per a pon interface is used for multicast service
 				//just put it in interfaceToMcastQueueMap to use for building group members
 				logger.Debugw(ctx, "multicast-traffic-queues", log.Fields{"device-id": f.deviceHandler.device.Id})
@@ -613,7 +565,7 @@
 				f.grpMgr.UpdateInterfaceToMcastQueueMap(sq.intfID, val)
 				//also store the queue info in kv store
 				if err := f.resourceMgr.AddMcastQueueForIntf(ctx, sq.intfID, multicastQueuePerPonPort.GemportId, multicastQueuePerPonPort.Priority); err != nil {
-					logger.Errorw(ctx, "failed-to-add-mcast-queue", log.Fields{"error": err})
+					logger.Errorw(ctx, "failed-to-add-mcast-queue", log.Fields{"err": err})
 					return err
 				}
 
@@ -639,27 +591,19 @@
 			"uni-port":  sq.uniPort,
 			"device-id": f.deviceHandler.device.Id})
 	if sq.direction == tp_pb.Direction_UPSTREAM {
-		SchedCfg, err = f.techprofile[sq.intfID].GetUsScheduler(ctx, sq.tpInst.(*tp.TechProfile))
+		SchedCfg = f.techprofile.GetUsScheduler(sq.tpInst.(*tp_pb.TechProfileInstance))
 		Direction = "upstream"
 	} else if sq.direction == tp_pb.Direction_DOWNSTREAM {
-		SchedCfg, err = f.techprofile[sq.intfID].GetDsScheduler(ctx, sq.tpInst.(*tp.TechProfile))
+		SchedCfg = f.techprofile.GetDsScheduler(sq.tpInst.(*tp_pb.TechProfileInstance))
 		Direction = "downstream"
 	}
 
-	if err != nil {
-		return olterrors.NewErrNotFound("scheduler-config",
-			log.Fields{
-				"int-id":    sq.intfID,
-				"direction": sq.direction,
-				"device-id": f.deviceHandler.device.Id}, err)
-	}
-
 	TrafficShaping := &tp_pb.TrafficShapingInfo{} // this info is not really useful for the agent during flow removal. Just use default values.
 
-	TrafficSched := []*tp_pb.TrafficScheduler{f.techprofile[sq.intfID].GetTrafficScheduler(sq.tpInst.(*tp.TechProfile), SchedCfg, TrafficShaping)}
+	TrafficSched := []*tp_pb.TrafficScheduler{f.techprofile.GetTrafficScheduler(sq.tpInst.(*tp_pb.TechProfileInstance), SchedCfg, TrafficShaping)}
 	TrafficSched[0].TechProfileId = sq.tpID
 
-	TrafficQueues, err := f.techprofile[sq.intfID].GetTrafficQueues(ctx, sq.tpInst.(*tp.TechProfile), sq.direction)
+	TrafficQueues, err := f.techprofile.GetTrafficQueues(ctx, sq.tpInst.(*tp_pb.TechProfileInstance), sq.direction)
 	if err != nil {
 		return olterrors.NewErrAdapter("unable-to-construct-traffic-queue-configuration",
 			log.Fields{
@@ -703,7 +647,7 @@
 				"uni-port": sq.uniPort})
 
 		if sq.direction == tp_pb.Direction_UPSTREAM {
-			allocID := sq.tpInst.(*tp.TechProfile).UsScheduler.AllocID
+			allocID := sq.tpInst.(*tp_pb.TechProfileInstance).UsScheduler.AllocId
 			f.resourceMgr.FreeAllocID(ctx, sq.intfID, sq.onuID, sq.uniID, allocID)
 			// Delete the TCONT on the ONU.
 			uni := getUniPortPath(f.deviceHandler.device.Id, sq.intfID, int32(sq.onuID), int32(sq.uniID))
@@ -752,7 +696,6 @@
 	var gemPortIDs []uint32
 	tpInstanceExists := false
 	var err error
-
 	allocIDs = f.resourceMgr.GetCurrentAllocIDsForOnu(ctx, intfID, onuID, uniID)
 	allgemPortIDs = f.resourceMgr.GetCurrentGEMPortIDsForOnu(ctx, intfID, onuID, uniID)
 	tpPath := f.getTPpath(ctx, intfID, uni, TpID)
@@ -765,24 +708,24 @@
 		"tp-id":     TpID})
 
 	// Check tech profile instance already exists for derived port name
-	techProfileInstance, _ := f.techprofile[intfID].GetTPInstanceFromKVStore(ctx, TpID, tpPath)
+	techProfileInstance, _ := f.techprofile.GetTPInstance(ctx, tpPath)
 	if techProfileInstance == nil {
 		logger.Infow(ctx, "tp-instance-not-found--creating-new",
 			log.Fields{
 				"path":      tpPath,
 				"device-id": f.deviceHandler.device.Id})
-		techProfileInstance, err = f.techprofile[intfID].CreateTechProfInstance(ctx, TpID, uni, intfID)
+		techProfileInstance, err = f.techprofile.CreateTechProfileInstance(ctx, TpID, uni, intfID)
 		if err != nil {
 			// This should not happen, something wrong in KV backend transaction
 			logger.Errorw(ctx, "tp-instance-create-failed",
 				log.Fields{
-					"error":     err,
+					"err":       err,
 					"tp-id":     TpID,
 					"device-id": f.deviceHandler.device.Id})
 			return 0, nil, nil
 		}
 		if err := f.resourceMgr.UpdateTechProfileIDForOnu(ctx, intfID, onuID, uniID, TpID); err != nil {
-			logger.Warnw(ctx, "failed-to-update-tech-profile-id", log.Fields{"error": err})
+			logger.Warnw(ctx, "failed-to-update-tech-profile-id", log.Fields{"err": err})
 		}
 	} else {
 		logger.Debugw(ctx, "tech-profile-instance-already-exist-for-given port-name",
@@ -793,14 +736,14 @@
 	}
 
 	switch tpInst := techProfileInstance.(type) {
-	case *tp.TechProfile:
+	case *tp_pb.TechProfileInstance:
 		if UsMeterID != 0 {
 			sq := schedQueue{direction: tp_pb.Direction_UPSTREAM, intfID: intfID, onuID: onuID, uniID: uniID, tpID: TpID,
 				uniPort: uniPort, tpInst: techProfileInstance, meterID: UsMeterID, flowMetadata: flowMetadata}
 			if err := f.CreateSchedulerQueues(ctx, sq); err != nil {
 				logger.Errorw(ctx, "CreateSchedulerQueues-failed-upstream",
 					log.Fields{
-						"error":     err,
+						"err":       err,
 						"onu-id":    onuID,
 						"uni-id":    uniID,
 						"intf-id":   intfID,
@@ -815,7 +758,7 @@
 			if err := f.CreateSchedulerQueues(ctx, sq); err != nil {
 				logger.Errorw(ctx, "CreateSchedulerQueues-failed-downstream",
 					log.Fields{
-						"error":     err,
+						"err":       err,
 						"onu-id":    onuID,
 						"uni-id":    uniID,
 						"intf-id":   intfID,
@@ -824,9 +767,9 @@
 				return 0, nil, nil
 			}
 		}
-		allocID := tpInst.UsScheduler.AllocID
+		allocID := tpInst.UsScheduler.AllocId
 		for _, gem := range tpInst.UpstreamGemPortAttributeList {
-			gemPortIDs = append(gemPortIDs, gem.GemportID)
+			gemPortIDs = append(gemPortIDs, gem.GemportId)
 		}
 		allocIDs = appendUnique32bit(allocIDs, allocID)
 
@@ -848,12 +791,12 @@
 		// Send Tconts and GEM ports to KV store
 		f.storeTcontsGEMPortsIntoKVStore(ctx, intfID, onuID, uniID, allocIDs, allgemPortIDs)
 		return allocID, gemPortIDs, techProfileInstance
-	case *tp.EponProfile:
+	case *openoltpb2.EponTechProfileInstance:
 		// CreateSchedulerQueues for EPON needs to be implemented here
 		// when voltha-protos for EPON is completed.
-		allocID := tpInst.AllocID
+		allocID := tpInst.AllocId
 		for _, gem := range tpInst.UpstreamQueueAttributeList {
-			gemPortIDs = append(gemPortIDs, gem.GemportID)
+			gemPortIDs = append(gemPortIDs, gem.GemportId)
 		}
 		allocIDs = appendUnique32bit(allocIDs, allocID)
 
@@ -897,36 +840,18 @@
 	if err := f.resourceMgr.UpdateGEMPortIDsForOnu(ctx, intfID, onuID, uniID, gemPortIDs); err != nil {
 		logger.Errorw(ctx, "error-while-uploading-gemports-to-kv-store", log.Fields{"device-id": f.deviceHandler.device.Id})
 	}
-	if err := f.resourceMgr.UpdateGEMportsPonportToOnuMapOnKVStore(ctx, gemPortIDs, intfID, onuID, uniID); err != nil {
-		logger.Error(ctx, "error-while-uploading-gemtopon-map-to-kv-store", log.Fields{"device-id": f.deviceHandler.device.Id})
-	} else {
-		//add to gem to uni cache
-		f.addGemPortUniAssociationsToCache(ctx, intfID, onuID, uniID, gemPortIDs)
-	}
+
 	logger.Infow(ctx, "stored-tconts-and-gem-into-kv-store-successfully", log.Fields{"device-id": f.deviceHandler.device.Id})
 	for _, gemPort := range gemPortIDs {
 		f.addGemPortToOnuInfoMap(ctx, intfID, onuID, gemPort)
 	}
 }
 
-//addGemPortUniAssociationsToCache
-func (f *OpenOltFlowMgr) addGemPortUniAssociationsToCache(ctx context.Context, intfID uint32, onuID uint32, uniID uint32, gemPortIDs []uint32) {
-	for _, gemPortID := range gemPortIDs {
-		key := gemPortKey{
-			intfID:  intfID,
-			gemPort: gemPortID,
-		}
-		f.toGemToUniMap(ctx, key, onuID, uniID)
-	}
-	logger.Debugw(ctx, "gem-to-uni-info-added-to-cache", log.Fields{"device-id": f.deviceHandler.device.Id, "intfID": intfID,
-		"gemPortIDs": gemPortIDs, "onuID": onuID, "uniID": uniID})
-}
-
 func (f *OpenOltFlowMgr) populateTechProfilePerPonPort(ctx context.Context) error {
 	var tpCount int
 	for _, techRange := range f.resourceMgr.DevInfo.Ranges {
 		for _, intfID := range techRange.IntfIds {
-			f.techprofile[intfID] = f.resourceMgr.ResourceMgrs[intfID].TechProfileMgr
+			f.techprofile = f.resourceMgr.PonRsrMgr.TechProfileMgr
 			tpCount++
 			logger.Debugw(ctx, "init-tech-profile-done",
 				log.Fields{
@@ -1004,13 +929,6 @@
 
 func (f *OpenOltFlowMgr) addSymmetricDataPathFlow(ctx context.Context, flowContext *flowContext, direction string) error {
 
-	var inverseDirection string
-	if direction == Upstream {
-		inverseDirection = Downstream
-	} else {
-		inverseDirection = Upstream
-	}
-
 	intfID := flowContext.intfID
 	onuID := flowContext.onuID
 	uniID := flowContext.uniID
@@ -1067,33 +985,23 @@
 			}, err).Log()
 	}
 
-	// Get symmetric flowID if it exists
-	// This symmetric flowID will be needed by agent software to use the same device flow-id that was used for the
-	// symmetric flow earlier
-	// symmetric flowID 0 is considered by agent as non-existent symmetric flow
-	keySymm := subscriberDataPathFlowIDKey{intfID: intfID, onuID: onuID, uniID: uniID, direction: inverseDirection, tpID: tpID}
-	f.subscriberDataPathFlowIDMapLock.RLock()
-	symmFlowID := f.subscriberDataPathFlowIDMap[keySymm]
-	f.subscriberDataPathFlowIDMapLock.RUnlock()
-
 	flow := openoltpb2.Flow{AccessIntfId: int32(intfID),
-		OnuId:           int32(onuID),
-		UniId:           int32(uniID),
-		FlowId:          logicalFlow.Id,
-		FlowType:        direction,
-		AllocId:         int32(allocID),
-		NetworkIntfId:   int32(networkIntfID),
-		GemportId:       int32(gemPortID),
-		Classifier:      classifierProto,
-		Action:          actionProto,
-		Priority:        int32(logicalFlow.Priority),
-		Cookie:          logicalFlow.Cookie,
-		PortNo:          flowContext.portNo,
-		TechProfileId:   tpID,
-		ReplicateFlow:   len(flowContext.pbitToGem) > 0,
-		PbitToGemport:   flowContext.pbitToGem,
-		SymmetricFlowId: symmFlowID,
-		GemportToAes:    flowContext.gemToAes,
+		OnuId:         int32(onuID),
+		UniId:         int32(uniID),
+		FlowId:        logicalFlow.Id,
+		FlowType:      direction,
+		AllocId:       int32(allocID),
+		NetworkIntfId: int32(networkIntfID),
+		GemportId:     int32(gemPortID),
+		Classifier:    classifierProto,
+		Action:        actionProto,
+		Priority:      int32(logicalFlow.Priority),
+		Cookie:        logicalFlow.Cookie,
+		PortNo:        flowContext.portNo,
+		TechProfileId: tpID,
+		ReplicateFlow: len(flowContext.pbitToGem) > 0,
+		PbitToGemport: flowContext.pbitToGem,
+		GemportToAes:  flowContext.gemToAes,
 	}
 	if err := f.addFlowToDevice(ctx, logicalFlow, &flow); err != nil {
 		return olterrors.NewErrFlowOp("add", logicalFlow.Id, nil, err).Log()
@@ -1104,21 +1012,6 @@
 			"flow":      flow,
 			"intf-id":   intfID,
 			"onu-id":    onuID})
-	flowInfo := rsrcMgr.FlowInfo{Flow: &flow, IsSymmtricFlow: true}
-	if err := f.resourceMgr.UpdateFlowIDInfo(ctx, uint32(flow.AccessIntfId), flow.OnuId, flow.UniId, flow.FlowId, flowInfo); err != nil {
-		return olterrors.NewErrPersistence("update", "flow", logicalFlow.Id,
-			log.Fields{
-				"flow":      flow,
-				"device-id": f.deviceHandler.device.Id,
-				"intf-id":   intfID,
-				"onu-id":    onuID}, err).Log()
-	}
-
-	// Update the current flowID to the map
-	keyCurr := subscriberDataPathFlowIDKey{intfID: intfID, onuID: onuID, uniID: uniID, direction: direction, tpID: tpID}
-	f.subscriberDataPathFlowIDMapLock.Lock()
-	f.subscriberDataPathFlowIDMap[keyCurr] = logicalFlow.Id
-	f.subscriberDataPathFlowIDMapLock.Unlock()
 
 	return nil
 }
@@ -1206,13 +1099,6 @@
 			"flow-id":   logicalFlow.Id,
 			"intf-id":   intfID,
 			"onu-id":    onuID})
-	flowInfo := rsrcMgr.FlowInfo{Flow: &dhcpFlow}
-	if err := f.resourceMgr.UpdateFlowIDInfo(ctx, uint32(dhcpFlow.AccessIntfId), dhcpFlow.OnuId, dhcpFlow.UniId, dhcpFlow.FlowId, flowInfo); err != nil {
-		return olterrors.NewErrPersistence("update", "flow", dhcpFlow.FlowId,
-			log.Fields{
-				"flow":      dhcpFlow,
-				"device-id": f.deviceHandler.device.Id}, err).Log()
-	}
 
 	return nil
 }
@@ -1301,11 +1187,6 @@
 		return olterrors.NewErrFlowOp("add", logicalFlow.Id, log.Fields{"flow": flow, "device-id": f.deviceHandler.device.Id}, err).Log()
 	}
 
-	flowInfo := rsrcMgr.FlowInfo{Flow: &flow}
-	if err := f.resourceMgr.UpdateFlowIDInfo(ctx, uint32(flow.AccessIntfId), flow.OnuId, flow.UniId, flow.FlowId, flowInfo); err != nil {
-		return olterrors.NewErrPersistence("update", "flow", flow.FlowId, log.Fields{"flow": flow, "device-id": f.deviceHandler.device.Id}, err).Log()
-	}
-
 	return nil
 }
 
@@ -1336,7 +1217,7 @@
 	uplinkAction := make(map[string]interface{})
 
 	// Fill Classfier
-	uplinkClassifier[EthType] = uint32(ethType)
+	uplinkClassifier[EthType] = ethType
 	uplinkClassifier[PacketTagType] = SingleTag
 	uplinkClassifier[VlanVid] = vlanID
 	uplinkClassifier[VlanPcp] = classifier[VlanPcp]
@@ -1415,13 +1296,7 @@
 			"intf-id":   intfID,
 			"ethType":   ethType,
 		})
-	flowInfo := rsrcMgr.FlowInfo{Flow: &upstreamFlow}
-	if err := f.resourceMgr.UpdateFlowIDInfo(ctx, uint32(upstreamFlow.AccessIntfId), upstreamFlow.OnuId, upstreamFlow.UniId, upstreamFlow.FlowId, flowInfo); err != nil {
-		return olterrors.NewErrPersistence("update", "flow", upstreamFlow.FlowId,
-			log.Fields{
-				"flow":      upstreamFlow,
-				"device-id": f.deviceHandler.device.Id}, err).Log()
-	}
+
 	return nil
 }
 
@@ -1502,7 +1377,7 @@
 
 // getTPpath return the ETCD path for a given UNI port
 func (f *OpenOltFlowMgr) getTPpath(ctx context.Context, intfID uint32, uniPath string, TpID uint32) string {
-	return f.techprofile[intfID].GetTechProfileInstanceKVPath(ctx, TpID, uniPath)
+	return f.techprofile.GetTechProfileInstanceKey(ctx, TpID, uniPath)
 }
 
 // DeleteTechProfileInstances removes the tech profile instances from persistent storage
@@ -1512,11 +1387,11 @@
 
 	for _, tpID := range tpIDList {
 		if err := f.DeleteTechProfileInstance(ctx, intfID, onuID, uniID, uniPortName, tpID); err != nil {
-			_ = olterrors.NewErrAdapter("delete-tech-profile-failed", log.Fields{"device-id": f.deviceHandler.device.Id}, err).Log()
+			logger.Errorw(ctx, "delete-tech-profile-failed", log.Fields{"err": err, "device-id": f.deviceHandler.device.Id})
 			// return err
 			// We should continue to delete tech-profile instances for other TP IDs
 		}
-		logger.Debugw(ctx, "tech-profile-deleted", log.Fields{"device-id": f.deviceHandler.device.Id, "tp-id": tpID})
+		logger.Debugw(ctx, "tech-profile-instance-deleted", log.Fields{"device-id": f.deviceHandler.device.Id, "uniPortName": uniPortName, "tp-id": tpID})
 	}
 	return nil
 }
@@ -1526,7 +1401,7 @@
 	if uniPortName == "" {
 		uniPortName = getUniPortPath(f.deviceHandler.device.Id, intfID, int32(onuID), int32(uniID))
 	}
-	if err := f.techprofile[intfID].DeleteTechProfileInstance(ctx, tpID, uniPortName); err != nil {
+	if err := f.techprofile.DeleteTechProfileInstance(ctx, tpID, uniPortName); err != nil {
 		return olterrors.NewErrAdapter("failed-to-delete-tp-instance-from-kv-store",
 			log.Fields{
 				"tp-id":         tpID,
@@ -1698,13 +1573,7 @@
 			"device-id": f.deviceHandler.device.Id,
 			"onu-id":    onuID,
 			"flow-id":   flow.Id})
-	flowInfo := rsrcMgr.FlowInfo{Flow: &downstreamflow}
-	if err := f.resourceMgr.UpdateFlowIDInfo(ctx, networkInterfaceID, int32(onuID), int32(uniID), flow.Id, flowInfo); err != nil {
-		return olterrors.NewErrPersistence("update", "flow", flow.Id,
-			log.Fields{
-				"flow":      downstreamflow,
-				"device-id": f.deviceHandler.device.Id}, err)
-	}
+
 	return nil
 }
 
@@ -1781,8 +1650,8 @@
 		return err
 	}
 
-	delGemPortMsg := &ic.InterAdapterDeleteGemPortMessage{UniId: uniID, TpPath: tpPath, GemPortId: gemPortID}
-	logger.Debugw(ctx, "sending-gem-port-delete-to-openonu-adapter",
+	delGemPortMsg := &ic.InterAdapterDeleteGemPortMessage{UniId: uniID, TpInstancePath: tpPath, GemPortId: gemPortID}
+	logger.Infow(ctx, "sending-gem-port-delete-to-openonu-adapter",
 		log.Fields{
 			"msg":       *delGemPortMsg,
 			"device-id": f.deviceHandler.device.Id})
@@ -1822,7 +1691,7 @@
 		return err
 	}
 
-	delTcontMsg := &ic.InterAdapterDeleteTcontMessage{UniId: uniID, TpPath: tpPath, AllocId: allocID}
+	delTcontMsg := &ic.InterAdapterDeleteTcontMessage{UniId: uniID, TpInstancePath: tpPath, AllocId: allocID}
 	logger.Debugw(ctx, "sending-tcont-delete-to-openonu-adapter",
 		log.Fields{
 			"msg":       *delTcontMsg,
@@ -1853,37 +1722,38 @@
 // Otherwise stale info continues to exist after gemport is freed and wrong logicalPortNo
 // is conveyed to ONOS during packet-in OF message.
 func (f *OpenOltFlowMgr) deleteGemPortFromLocalCache(ctx context.Context, intfID uint32, onuID uint32, gemPortID uint32) {
-
-	f.onuGemInfoLock.Lock()
-	defer f.onuGemInfoLock.Unlock()
-
 	logger.Infow(ctx, "deleting-gem-from-local-cache",
 		log.Fields{
 			"gem-port-id": gemPortID,
 			"intf-id":     intfID,
 			"onu-id":      onuID,
-			"device-id":   f.deviceHandler.device.Id,
-			"onu-gem":     f.onuGemInfo})
-
-	onugem := f.onuGemInfo
+			"device-id":   f.deviceHandler.device.Id})
+	f.onuGemInfoLock.RLock()
+	onugem, ok := f.onuGemInfoMap[onuID]
+	f.onuGemInfoLock.RUnlock()
+	if !ok {
+		logger.Warnw(ctx, "onu gem info already cleared from cache", log.Fields{
+			"gem-port-id": gemPortID,
+			"intf-id":     intfID,
+			"onu-id":      onuID,
+			"device-id":   f.deviceHandler.device.Id})
+		return
+	}
 deleteLoop:
-	for i, onu := range onugem {
-		if onu.OnuID == onuID {
-			for j, gem := range onu.GemPorts {
-				// If the gemport is found, delete it from local cache.
-				if gem == gemPortID {
-					onu.GemPorts = append(onu.GemPorts[:j], onu.GemPorts[j+1:]...)
-					onugem[i] = onu
-					logger.Infow(ctx, "removed-gemport-from-local-cache",
-						log.Fields{
-							"intf-id":           intfID,
-							"onu-id":            onuID,
-							"deletedgemport-id": gemPortID,
-							"gemports":          onu.GemPorts,
-							"device-id":         f.deviceHandler.device.Id})
-					break deleteLoop
-				}
-			}
+	for j, gem := range onugem.GemPorts {
+		// If the gemport is found, delete it from local cache.
+		if gem == gemPortID {
+			onugem.GemPorts = append(onugem.GemPorts[:j], onugem.GemPorts[j+1:]...)
+			f.onuGemInfoLock.Lock()
+			f.onuGemInfoMap[onuID] = onugem
+			f.onuGemInfoLock.Unlock()
+			logger.Infow(ctx, "removed-gemport-from-local-cache",
+				log.Fields{
+					"intf-id":           intfID,
+					"onu-id":            onuID,
+					"deletedgemport-id": gemPortID,
+					"gemports":          onugem.GemPorts,
+					"device-id":         f.deviceHandler.device.Id})
 			break deleteLoop
 		}
 	}
@@ -1891,7 +1761,7 @@
 
 //clearResources clears pon resources in kv store and the device
 // nolint: gocyclo
-func (f *OpenOltFlowMgr) clearResources(ctx context.Context, flow *ofp.OfpFlowStats, intfID uint32, onuID int32, uniID int32,
+func (f *OpenOltFlowMgr) clearResources(ctx context.Context, intfID uint32, onuID int32, uniID int32,
 	gemPortID int32, flowID uint64, portNum uint32, tpID uint32) error {
 
 	uni := getUniPortPath(f.deviceHandler.device.Id, intfID, onuID, uniID)
@@ -1900,27 +1770,22 @@
 		log.Fields{
 			"tpPath":    tpPath,
 			"device-id": f.deviceHandler.device.Id})
-	techprofileInst, err := f.techprofile[intfID].GetTPInstanceFromKVStore(ctx, tpID, tpPath)
-	if err != nil || techprofileInst == nil { // This should not happen, something wrong in KV backend transaction
-		return olterrors.NewErrNotFound("tech-profile-in-kv-store",
-			log.Fields{
-				"tp-id": tpID,
-				"path":  tpPath}, err)
-	}
 
 	used := f.isGemPortUsedByAnotherFlow(uint32(gemPortID))
 
 	if used {
-		f.flowsUsedByGemPortKey.Lock()
-		defer f.flowsUsedByGemPortKey.Unlock()
+		f.gemToFlowIDsKey.RLock()
+		flowIDs := f.gemToFlowIDs[uint32(gemPortID)]
+		f.gemToFlowIDsKey.RUnlock()
 
-		flowIDs := f.flowsUsedByGemPort[uint32(gemPortID)]
 		for i, flowIDinMap := range flowIDs {
 			if flowIDinMap == flowID {
 				flowIDs = append(flowIDs[:i], flowIDs[i+1:]...)
-				// everytime flowsUsedByGemPort cache is updated the same should be updated
+				f.gemToFlowIDsKey.Lock()
+				f.gemToFlowIDs[uint32(gemPortID)] = flowIDs
+				f.gemToFlowIDsKey.Unlock()
+				// everytime gemToFlowIDs cache is updated the same should be updated
 				// in kv store by calling UpdateFlowIDsForGem
-				f.flowsUsedByGemPort[uint32(gemPortID)] = flowIDs
 				if err := f.resourceMgr.UpdateFlowIDsForGem(ctx, intfID, uint32(gemPortID), flowIDs); err != nil {
 					return err
 				}
@@ -1936,28 +1801,17 @@
 		return nil
 	}
 	logger.Debugf(ctx, "gem-port-id %d is-not-used-by-another-flow--releasing-the-gem-port", gemPortID)
-	f.resourceMgr.RemoveGemPortIDForOnu(ctx, intfID, uint32(onuID), uint32(uniID), uint32(gemPortID))
-	// TODO: The TrafficQueue corresponding to this gem-port also should be removed immediately.
-	// But it is anyway eventually  removed later when the TechProfile is freed, so not a big issue for now.
-	f.resourceMgr.RemoveGEMportPonportToOnuMapOnKVStore(ctx, uint32(gemPortID), intfID)
-	// also clear gem to uni cache
-	f.removeFromGemToUniMap(gemPortKey{
-		intfID:  intfID,
-		gemPort: uint32(gemPortID),
-	})
 	f.deleteGemPortFromLocalCache(ctx, intfID, uint32(onuID), uint32(gemPortID))
-
-	f.onuIdsLock.Lock() // TODO: What is this lock?
-
-	//everytime an entry is deleted from flowsUsedByGemPort cache, the same should be updated in kv as well
+	_ = f.resourceMgr.RemoveGemFromOnuGemInfo(ctx, intfID, uint32(onuID), uint32(gemPortID)) // ignore error and proceed.
+	//everytime an entry is deleted from gemToFlowIDs cache, the same should be updated in kv as well
 	// by calling DeleteFlowIDsForGem
-	f.flowsUsedByGemPortKey.Lock()
-	delete(f.flowsUsedByGemPort, uint32(gemPortID))
-	f.flowsUsedByGemPortKey.Unlock()
-	f.resourceMgr.DeleteFlowIDsForGem(ctx, intfID, uint32(gemPortID))
-	f.resourceMgr.FreeGemPortID(ctx, intfID, uint32(onuID), uint32(uniID), uint32(gemPortID))
+	f.gemToFlowIDsKey.Lock()
+	delete(f.gemToFlowIDs, uint32(gemPortID))
+	f.gemToFlowIDsKey.Unlock()
 
-	f.onuIdsLock.Unlock()
+	f.resourceMgr.DeleteFlowIDsForGem(ctx, intfID, uint32(gemPortID))
+
+	f.resourceMgr.FreeGemPortID(ctx, intfID, uint32(onuID), uint32(uniID), uint32(gemPortID))
 
 	// Delete the gem port on the ONU.
 	if err := f.sendDeleteGemPortToChild(ctx, intfID, uint32(onuID), uint32(uniID), uint32(gemPortID), tpPath); err != nil {
@@ -1970,8 +1824,15 @@
 				"device-id":  f.deviceHandler.device.Id,
 				"gemport-id": gemPortID})
 	}
+	techprofileInst, err := f.techprofile.GetTPInstance(ctx, tpPath)
+	if err != nil || techprofileInst == nil { // This should not happen, something wrong in KV backend transaction
+		return olterrors.NewErrNotFound("tech-profile-in-kv-store",
+			log.Fields{
+				"tp-id": tpID,
+				"path":  tpPath}, err)
+	}
 	switch techprofileInst := techprofileInst.(type) {
-	case *tp.TechProfile:
+	case *tp_pb.TechProfileInstance:
 		ok, _ := f.isTechProfileUsedByAnotherGem(ctx, intfID, uint32(onuID), uint32(uniID), techprofileInst, uint32(gemPortID))
 		if !ok {
 			if err := f.resourceMgr.RemoveTechProfileIDForOnu(ctx, intfID, uint32(onuID), uint32(uniID), tpID); err != nil {
@@ -1987,23 +1848,23 @@
 				logger.Warn(ctx, err)
 			}
 		}
-	case *tp.EponProfile:
+	case *tp_pb.EponTechProfileInstance:
 		if err := f.resourceMgr.RemoveTechProfileIDForOnu(ctx, intfID, uint32(onuID), uint32(uniID), tpID); err != nil {
 			logger.Warn(ctx, err)
 		}
 		if err := f.DeleteTechProfileInstance(ctx, intfID, uint32(onuID), uint32(uniID), "", tpID); err != nil {
 			logger.Warn(ctx, err)
 		}
-		f.resourceMgr.FreeAllocID(ctx, intfID, uint32(onuID), uint32(uniID), techprofileInst.AllocID)
+		f.resourceMgr.FreeAllocID(ctx, intfID, uint32(onuID), uint32(uniID), techprofileInst.AllocId)
 		// Delete the TCONT on the ONU.
-		if err := f.sendDeleteTcontToChild(ctx, intfID, uint32(onuID), uint32(uniID), techprofileInst.AllocID, tpPath); err != nil {
+		if err := f.sendDeleteTcontToChild(ctx, intfID, uint32(onuID), uint32(uniID), techprofileInst.AllocId, tpPath); err != nil {
 			logger.Errorw(ctx, "error-processing-delete-tcont-towards-onu",
 				log.Fields{
 					"intf":      intfID,
 					"onu-id":    onuID,
 					"uni-id":    uniID,
 					"device-id": f.deviceHandler.device.Id,
-					"alloc-id":  techprofileInst.AllocID})
+					"alloc-id":  techprofileInst.AllocId})
 		}
 	default:
 		logger.Errorw(ctx, "error-unknown-tech",
@@ -2016,7 +1877,6 @@
 
 // nolint: gocyclo
 func (f *OpenOltFlowMgr) clearFlowFromDeviceAndResourceManager(ctx context.Context, flow *ofp.OfpFlowStats, flowDirection string) error {
-	var flowInfo *rsrcMgr.FlowInfo
 	logger.Infow(ctx, "clear-flow-from-resource-manager",
 		log.Fields{
 			"flowDirection": flowDirection,
@@ -2037,6 +1897,16 @@
 
 	onuID := int32(onu)
 	uniID := int32(uni)
+	tpID, err := getTpIDFromFlow(ctx, flow)
+	if err != nil {
+		return olterrors.NewErrNotFound("tp-id",
+			log.Fields{
+				"flow":      flow,
+				"intf-id":   Intf,
+				"onu-id":    onuID,
+				"uni-id":    uniID,
+				"device-id": f.deviceHandler.device.Id}, err)
+	}
 
 	for _, field := range flows.GetOfbFields(flow) {
 		if field.Type == flows.IP_PROTO {
@@ -2060,86 +1930,45 @@
 			logger.Errorw(ctx, "invalid-in-port-number",
 				log.Fields{
 					"port-number": inPort,
-					"error":       err})
+					"err":         err})
 			return err
 		}
 	}
-	if flowInfo = f.resourceMgr.GetFlowIDInfo(ctx, Intf, onuID, uniID, flow.Id); flowInfo == nil {
-		logger.Errorw(ctx, "flow-info-not-found-for-flow-to-be-removed", log.Fields{"flow-id": flow.Id, "intf-id": Intf, "onu-id": onuID, "uni-id": uniID})
-		return olterrors.NewErrPersistence("remove", "flow", flow.Id, log.Fields{"flow": flow}, err)
-	}
-	removeFlowMessage := openoltpb2.Flow{FlowId: flowInfo.Flow.FlowId, FlowType: flowInfo.Flow.FlowType}
-	logger.Debugw(ctx, "flow-to-be-deleted", log.Fields{"flow": flowInfo.Flow})
+
+	removeFlowMessage := openoltpb2.Flow{FlowId: flow.Id, AccessIntfId: int32(Intf), OnuId: onuID, UniId: uniID, TechProfileId: tpID, FlowType: flowDirection}
+	logger.Debugw(ctx, "flow-to-be-deleted", log.Fields{"flow": flow})
 	if err = f.removeFlowFromDevice(ctx, &removeFlowMessage, flow.Id); err != nil {
 		return err
 	}
-	if err = f.resourceMgr.RemoveFlowIDInfo(ctx, Intf, onuID, uniID, flow.Id); err != nil {
-		logger.Errorw(ctx, "failed-to-remove-flow-on-kv-store", log.Fields{"error": err})
-		return err
-	}
-	tpID, err := getTpIDFromFlow(ctx, flow)
-	if err != nil {
-		return olterrors.NewErrNotFound("tp-id",
-			log.Fields{
-				"flow":      flow,
-				"intf-id":   Intf,
-				"onu-id":    onuID,
-				"uni-id":    uniID,
-				"device-id": f.deviceHandler.device.Id}, err)
-	}
 
-	if !flowInfo.Flow.ReplicateFlow {
-		if err = f.clearResources(ctx, flow, Intf, onuID, uniID, flowInfo.Flow.GemportId, flowInfo.Flow.FlowId, portNum, tpID); err != nil {
+	f.flowIDToGemsLock.Lock()
+	gems, ok := f.flowIDToGems[flow.Id]
+	if !ok {
+		logger.Errorw(ctx, "flow-id-to-gem-map-not-found", log.Fields{"flowID": flow.Id})
+		f.flowIDToGemsLock.Unlock()
+		return olterrors.NewErrNotFound("flow-id-to-gem-map-not-found", log.Fields{"flowID": flow.Id}, nil)
+	}
+	copyOfGems := make([]uint32, len(gems))
+	_ = copy(copyOfGems, gems)
+	// Delete the flow-id to gemport list entry from the map now the flow is deleted.
+	delete(f.flowIDToGems, flow.Id)
+	f.flowIDToGemsLock.Unlock()
+
+	logger.Debugw(ctx, "gems-to-be-cleared", log.Fields{"gems": copyOfGems})
+	for _, gem := range copyOfGems {
+		if err = f.clearResources(ctx, Intf, onuID, uniID, int32(gem), flow.Id, portNum, tpID); err != nil {
 			logger.Errorw(ctx, "failed-to-clear-resources-for-flow", log.Fields{
-				"flow-id":        flow.Id,
-				"stored-flow":    flowInfo.Flow,
-				"device-id":      f.deviceHandler.device.Id,
-				"stored-flow-id": flowInfo.Flow.FlowId,
-				"onu-id":         onuID,
-				"intf":           Intf,
-				"err":            err,
+				"flow-id":   flow.Id,
+				"device-id": f.deviceHandler.device.Id,
+				"onu-id":    onuID,
+				"intf":      Intf,
+				"gem":       gem,
+				"err":       err,
 			})
 			return err
 		}
-	} else {
-		gems := make([]uint32, 0)
-		for _, gem := range flowInfo.Flow.PbitToGemport {
-			gems = appendUnique32bit(gems, gem)
-		}
-		logger.Debugw(ctx, "gems-to-be-cleared", log.Fields{"gems": gems})
-		for _, gem := range gems {
-			if err = f.clearResources(ctx, flow, Intf, onuID, uniID, int32(gem), flowInfo.Flow.FlowId, portNum, tpID); err != nil {
-				logger.Errorw(ctx, "failed-to-clear-resources-for-flow", log.Fields{
-					"flow-id":        flow.Id,
-					"stored-flow":    flowInfo.Flow,
-					"device-id":      f.deviceHandler.device.Id,
-					"stored-flow-id": flowInfo.Flow.FlowId,
-					"onu-id":         onuID,
-					"intf":           Intf,
-					"gem":            gem,
-					"err":            err,
-				})
-				return err
-			}
-		}
 	}
 
-	// If datapath flow, clear the symmetric flow data from the subscriberDataPathFlowIDMap map
-	if isDatapathFlow(flow) {
-		if tpID, err := getTpIDFromFlow(ctx, flow); err != nil {
-			var inverseDirection string
-			if flowDirection == Upstream {
-				inverseDirection = Downstream
-			} else {
-				inverseDirection = Upstream
-			}
-
-			keySymm := subscriberDataPathFlowIDKey{intfID: Intf, onuID: uint32(onuID), uniID: uint32(uniID), direction: inverseDirection, tpID: tpID}
-			f.subscriberDataPathFlowIDMapLock.Lock()
-			delete(f.subscriberDataPathFlowIDMap, keySymm)
-			f.subscriberDataPathFlowIDMapLock.Unlock()
-		}
-	}
 	// Decrement reference count for the meter associated with the given <(pon_id, onu_id, uni_id)>/<tp_id>/meter_id/<direction>
 	if err := f.resourceMgr.HandleMeterInfoRefCntUpdate(ctx, flowDirection, Intf, uint32(onuID), uint32(uniID), tpID, false); err != nil {
 		return err
@@ -2203,7 +2032,8 @@
 	// Step2 : Push the flowControlBlock to ONU channel
 	// Step3 : Wait on response channel for response
 	// Step4 : Return error value
-	logger.Debugw(ctx, "process-flow", log.Fields{"flow": flow, "addFlow": addFlow})
+	startTime := time.Now()
+	logger.Infow(ctx, "process-flow", log.Fields{"flow": flow, "addFlow": addFlow})
 	errChan := make(chan error)
 	flowCb := flowControlBlock{
 		ctx:          ctx,
@@ -2223,7 +2053,7 @@
 	f.incomingFlows[onuID] <- flowCb
 	// Wait on the channel for flow handlers return value
 	err := <-errChan
-	logger.Debugw(ctx, "process-flow--received-resp", log.Fields{"flow": flow, "addFlow": addFlow, "err": err})
+	logger.Infow(ctx, "process-flow--received-resp", log.Fields{"err": err, "totalTimeSeconds": time.Since(startTime).Seconds()})
 	return err
 }
 
@@ -2235,17 +2065,17 @@
 		// process the flow completely before proceeding to handle the next flow
 		flowCb := <-subscriberFlowChannel
 		if flowCb.addFlow {
-			logger.Debugw(flowCb.ctx, "adding-flow",
-				log.Fields{"device-id": f.deviceHandler.device.Id,
-					"flowToAdd": flowCb.flow})
+			logger.Info(flowCb.ctx, "adding-flow-start")
+			startTime := time.Now()
 			err := f.AddFlow(flowCb.ctx, flowCb.flow, flowCb.flowMetadata)
+			logger.Infow(flowCb.ctx, "adding-flow-complete", log.Fields{"processTimeSecs": time.Since(startTime).Seconds()})
 			// Pass the return value over the return channel
 			*flowCb.errChan <- err
 		} else {
-			logger.Debugw(flowCb.ctx, "removing-flow",
-				log.Fields{"device-id": f.deviceHandler.device.Id,
-					"flowToRemove": flowCb.flow})
+			logger.Info(flowCb.ctx, "removing-flow-start")
+			startTime := time.Now()
 			err := f.RemoveFlow(flowCb.ctx, flowCb.flow)
+			logger.Infow(flowCb.ctx, "removing-flow-complete", log.Fields{"processTimeSecs": time.Since(startTime).Seconds()})
 			// Pass the return value over the return channel
 			*flowCb.errChan <- err
 		}
@@ -2393,14 +2223,10 @@
 		}
 		//cached group can be removed now
 		if err := f.resourceMgr.RemoveFlowGroupFromKVStore(ctx, groupID, true); err != nil {
-			logger.Warnw(ctx, "failed-to-remove-flow-group", log.Fields{"group-id": groupID, "error": err})
+			logger.Warnw(ctx, "failed-to-remove-flow-group", log.Fields{"group-id": groupID, "err": err})
 		}
 	}
 
-	flowInfo := rsrcMgr.FlowInfo{Flow: &multicastFlow}
-	if err = f.resourceMgr.UpdateFlowIDInfo(ctx, networkInterfaceID, int32(onuID), int32(uniID), flow.Id, flowInfo); err != nil {
-		return olterrors.NewErrPersistence("update", "flow", flow.Id, log.Fields{"flow": multicastFlow}, err)
-	}
 	return nil
 }
 
@@ -2413,16 +2239,13 @@
 		}
 		return nniInterfaceID, nil
 	}
-	// find the first NNI interface id of the device
-	nniPorts, e := f.resourceMgr.GetNNIFromKVStore(ctx)
-	if e == nil && len(nniPorts) > 0 {
-		return nniPorts[0], nil
-	}
-	return 0, olterrors.NewErrNotFound("nni-port", nil, e).Log()
+
+	// TODO: For now we support only one NNI port in VOLTHA. We shall use only the first NNI port, i.e., interface-id 0.
+	return 0, nil
 }
 
 //sendTPDownloadMsgToChild send payload
-func (f *OpenOltFlowMgr) sendTPDownloadMsgToChild(ctx context.Context, intfID uint32, onuID uint32, uniID uint32, uni string, TpID uint32) error {
+func (f *OpenOltFlowMgr) sendTPDownloadMsgToChild(ctx context.Context, intfID uint32, onuID uint32, uniID uint32, uni string, TpID uint32, tpInst tp_pb.TechProfileInstance) error {
 
 	onuDev, err := f.getOnuDevice(ctx, intfID, onuID)
 	if err != nil {
@@ -2436,7 +2259,11 @@
 	logger.Debugw(ctx, "got-child-device-from-olt-device-handler", log.Fields{"onu-id": onuDev.deviceID})
 
 	tpPath := f.getTPpath(ctx, intfID, uni, TpID)
-	tpDownloadMsg := &ic.InterAdapterTechProfileDownloadMessage{UniId: uniID, Path: tpPath}
+	tpDownloadMsg := &ic.InterAdapterTechProfileDownloadMessage{
+		UniId:          uniID,
+		TpInstancePath: tpPath,
+		TechTpInstance: &ic.InterAdapterTechProfileDownloadMessage_TpInstance{TpInstance: &tpInst},
+	}
 	logger.Debugw(ctx, "sending-load-tech-profile-request-to-brcm-onu-adapter", log.Fields{"tpDownloadMsg": *tpDownloadMsg})
 	sendErr := f.deviceHandler.AdapterProxy.SendInterAdapterMessage(log.WithSpanFromContext(context.Background(), ctx),
 		tpDownloadMsg,
@@ -2458,24 +2285,25 @@
 }
 
 //UpdateOnuInfo function adds onu info to cache and kvstore
+//UpdateOnuInfo function adds onu info to cache and kvstore
 func (f *OpenOltFlowMgr) UpdateOnuInfo(ctx context.Context, intfID uint32, onuID uint32, serialNum string) error {
 
-	f.onuGemInfoLock.Lock()
-	defer f.onuGemInfoLock.Unlock()
-	onugem := f.onuGemInfo
+	f.onuGemInfoLock.RLock()
+	_, ok := f.onuGemInfoMap[onuID]
+	f.onuGemInfoLock.RUnlock()
 	// If the ONU already exists in onuGemInfo list, nothing to do
-	for _, onu := range onugem {
-		if onu.OnuID == onuID && onu.SerialNumber == serialNum {
-			logger.Debugw(ctx, "onu-id-already-exists-in-cache",
-				log.Fields{"onuID": onuID,
-					"serialNum": serialNum})
-			return nil
-		}
+	if ok {
+		logger.Debugw(ctx, "onu-id-already-exists-in-cache",
+			log.Fields{"onuID": onuID,
+				"serialNum": serialNum})
+		return nil
 	}
 
-	onu := rsrcMgr.OnuGemInfo{OnuID: onuID, SerialNumber: serialNum, IntfID: intfID}
-	f.onuGemInfo = append(f.onuGemInfo, onu)
-	if err := f.resourceMgr.AddOnuGemInfo(ctx, intfID, onu); err != nil {
+	onuGemInfo := rsrcMgr.OnuGemInfo{OnuID: onuID, SerialNumber: serialNum, IntfID: intfID}
+	f.onuGemInfoLock.Lock()
+	f.onuGemInfoMap[onuID] = &onuGemInfo
+	f.onuGemInfoLock.Unlock()
+	if err := f.resourceMgr.AddOnuGemInfo(ctx, intfID, onuID, onuGemInfo); err != nil {
 		return err
 	}
 	logger.Infow(ctx, "updated-onuinfo",
@@ -2483,7 +2311,7 @@
 			"intf-id":    intfID,
 			"onu-id":     onuID,
 			"serial-num": serialNum,
-			"onu":        onu,
+			"onu":        onuGemInfo,
 			"device-id":  f.deviceHandler.device.Id})
 	return nil
 }
@@ -2491,34 +2319,46 @@
 //addGemPortToOnuInfoMap function adds GEMport to ONU map
 func (f *OpenOltFlowMgr) addGemPortToOnuInfoMap(ctx context.Context, intfID uint32, onuID uint32, gemPort uint32) {
 
-	f.onuGemInfoLock.Lock()
-	defer f.onuGemInfoLock.Unlock()
-
 	logger.Infow(ctx, "adding-gem-to-onu-info-map",
 		log.Fields{
 			"gem-port-id": gemPort,
 			"intf-id":     intfID,
 			"onu-id":      onuID,
-			"device-id":   f.deviceHandler.device.Id,
-			"onu-gem":     f.onuGemInfo})
-	onugem := f.onuGemInfo
-	// update the gem to the local cache as well as to kv strore
-	for idx, onu := range onugem {
-		if onu.OnuID == onuID {
-			// check if gem already exists , else update the cache and kvstore
-			for _, gem := range onu.GemPorts {
-				if gem == gemPort {
-					logger.Debugw(ctx, "gem-already-in-cache-no-need-to-update-cache-and-kv-store",
-						log.Fields{
-							"gem":       gemPort,
-							"device-id": f.deviceHandler.device.Id})
-					return
-				}
+			"device-id":   f.deviceHandler.device.Id})
+	f.onuGemInfoLock.RLock()
+	onugem, ok := f.onuGemInfoMap[onuID]
+	f.onuGemInfoLock.RUnlock()
+	if !ok {
+		logger.Warnw(ctx, "onu gem info is missing", log.Fields{
+			"gem-port-id": gemPort,
+			"intf-id":     intfID,
+			"onu-id":      onuID,
+			"device-id":   f.deviceHandler.device.Id})
+		return
+	}
+
+	if onugem.OnuID == onuID {
+		// check if gem already exists , else update the cache and kvstore
+		for _, gem := range onugem.GemPorts {
+			if gem == gemPort {
+				logger.Debugw(ctx, "gem-already-in-cache-no-need-to-update-cache-and-kv-store",
+					log.Fields{
+						"gem":       gemPort,
+						"device-id": f.deviceHandler.device.Id})
+				return
 			}
-			onugem[idx].GemPorts = append(onugem[idx].GemPorts, gemPort)
-			f.onuGemInfo = onugem
-			break
 		}
+		onugem.GemPorts = append(onugem.GemPorts, gemPort)
+		f.onuGemInfoLock.Lock()
+		f.onuGemInfoMap[onuID] = onugem
+		f.onuGemInfoLock.Unlock()
+	} else {
+		logger.Warnw(ctx, "mismatched onu id", log.Fields{
+			"gem-port-id": gemPort,
+			"intf-id":     intfID,
+			"onu-id":      onuID,
+			"device-id":   f.deviceHandler.device.Id})
+		return
 	}
 	err := f.resourceMgr.AddGemToOnuGemInfo(ctx, intfID, onuID, gemPort)
 	if err != nil {
@@ -2535,24 +2375,18 @@
 			"gem-port-id": gemPort,
 			"intf-id":     intfID,
 			"onu-id":      onuID,
-			"device-id":   f.deviceHandler.device.Id,
-			"onu-gem":     f.onuGemInfo})
+			"device-id":   f.deviceHandler.device.Id})
 }
 
 //GetLogicalPortFromPacketIn function computes logical port UNI/NNI port from packet-in indication and returns the same
 func (f *OpenOltFlowMgr) GetLogicalPortFromPacketIn(ctx context.Context, packetIn *openoltpb2.PacketIndication) (uint32, error) {
 	var logicalPortNum uint32
-	var onuID, uniID uint32
-	var err error
 
 	if packetIn.IntfType == "pon" {
 		// packet indication does not have serial number , so sending as nil
 		// get onu and uni ids associated with the given pon and gem ports
-		if onuID, uniID, err = f.GetUniPortByPonPortGemPort(ctx, packetIn.IntfId, packetIn.GemportId); err != nil {
-			// Called method is returning error with all data populated; just return the same
-			return logicalPortNum, err
-		}
-		logger.Debugf(ctx, "retrieved ONU and UNI IDs [%d, %d] by interface:%d, gem:%d")
+		onuID, uniID := packetIn.OnuId, packetIn.UniId
+		logger.Debugf(ctx, "retrieved ONU and UNI IDs [%d, %d] by interface:%d, gem:%d", packetIn.OnuId, packetIn.UniId, packetIn.GemportId)
 
 		if packetIn.PortNo != 0 {
 			logicalPortNum = packetIn.PortNo
@@ -2576,40 +2410,6 @@
 	return logicalPortNum, nil
 }
 
-//GetUniPortByPonPortGemPort return onu and uni IDs associated with given pon and gem ports
-func (f *OpenOltFlowMgr) GetUniPortByPonPortGemPort(ctx context.Context, intfID uint32, gemPortID uint32) (uint32, uint32, error) {
-	key := gemPortKey{
-		intfID:  intfID,
-		gemPort: gemPortID,
-	}
-	uniPortInfo, ok := f.fromGemToUniMap(key) //try to get from the cache first
-	if ok {
-		if len(uniPortInfo) > 1 {
-			//return onu ID and uni port from the cache
-			logger.Debugw(ctx, "found-uni-port-by-pon-and-gem-ports",
-				log.Fields{
-					"intfID":       intfID,
-					"gemPortID":    gemPortID,
-					"onuID, uniID": uniPortInfo})
-			return uniPortInfo[0], uniPortInfo[1], nil
-		}
-	}
-	//If uni port is not found in cache try to get it from kv store. if it is found in kv store, update the cache and return.
-	onuID, uniID, err := f.resourceMgr.GetUniPortByPonPortGemPortFromKVStore(ctx, intfID, gemPortID)
-	if err == nil {
-		f.toGemToUniMap(ctx, key, onuID, uniID)
-		logger.Infow(ctx, "found-uni-port-by-pon-and-gem-port-from-kv-store-and-updating-cache-with-uni-port",
-			log.Fields{
-				"gemPortKey": key,
-				"onuID":      onuID,
-				"uniID":      uniID})
-		return onuID, uniID, nil
-	}
-	return uint32(0), uint32(0), olterrors.NewErrNotFound("uni-id",
-		log.Fields{"interfaceID": intfID, "gemPortID": gemPortID},
-		errors.New("no uni port found"))
-}
-
 //GetPacketOutGemPortID returns gemPortId
 func (f *OpenOltFlowMgr) GetPacketOutGemPortID(ctx context.Context, intfID uint32, onuID uint32, portNum uint32, packet []byte) (uint32, error) {
 	var gemPortID uint32
@@ -2721,10 +2521,6 @@
 		return olterrors.NewErrFlowOp("add", logicalFlow.Id, log.Fields{"flow": downstreamflow}, err)
 	}
 	logger.Info(ctx, "trap-on-nni-flow-added–to-device-successfully")
-	flowInfo := rsrcMgr.FlowInfo{Flow: &downstreamflow}
-	if err := f.resourceMgr.UpdateFlowIDInfo(ctx, networkInterfaceID, int32(onuID), int32(uniID), logicalFlow.Id, flowInfo); err != nil {
-		return olterrors.NewErrPersistence("update", "flow", logicalFlow.Id, log.Fields{"flow": downstreamflow}, err)
-	}
 	return nil
 }
 
@@ -2814,10 +2610,7 @@
 		return olterrors.NewErrFlowOp("add", logicalFlow.Id, log.Fields{"flow": downstreamflow}, err)
 	}
 	logger.Info(ctx, "igmp-trap-on-nni-flow-added-to-device-successfully")
-	flowInfo := rsrcMgr.FlowInfo{Flow: &downstreamflow}
-	if err := f.resourceMgr.UpdateFlowIDInfo(ctx, networkInterfaceID, int32(onuID), int32(uniID), logicalFlow.Id, flowInfo); err != nil {
-		return olterrors.NewErrPersistence("update", "flow", logicalFlow.Id, log.Fields{"flow": downstreamflow}, err)
-	}
+
 	return nil
 }
 
@@ -2846,10 +2639,10 @@
 	pbitToGem := make(map[uint32]uint32)
 	gemToAes := make(map[uint32]bool)
 
-	var attributes []tp.IGemPortAttribute
+	var attributes []*tp_pb.GemPortAttributes
 	var direction = tp_pb.Direction_UPSTREAM
 	switch TpInst := TpInst.(type) {
-	case *tp.TechProfile:
+	case *tp_pb.TechProfileInstance:
 		if IsUpstream(actionInfo[Output].(uint32)) {
 			attributes = TpInst.UpstreamGemPortAttributeList
 		} else {
@@ -2881,9 +2674,9 @@
 			}
 		}
 	} else { // Extract the exact gemport which maps to the PCP classifier in the flow
-		if gem := f.techprofile[intfID].GetGemportForPbit(ctx, TpInst, direction, pcp.(uint32)); gem != nil {
-			gemPortID = gem.(tp.IGemPortAttribute).GemportID
-			gemToAes[gemPortID], _ = strconv.ParseBool(gem.(tp.IGemPortAttribute).AesEncryption)
+		if gem := f.techprofile.GetGemportForPbit(ctx, TpInst, direction, pcp.(uint32)); gem != nil {
+			gemPortID = gem.(*tp_pb.GemPortAttributes).GemportId
+			gemToAes[gemPortID], _ = strconv.ParseBool(gem.(*tp_pb.GemPortAttributes).AesEncryption)
 		}
 	}
 
@@ -2981,26 +2774,26 @@
 	}
 	// Send Techprofile download event to child device in go routine as it takes time
 	go func() {
-		if err := f.sendTPDownloadMsgToChild(ctx, intfID, onuID, uniID, uni, tpID); err != nil {
+		if err := f.sendTPDownloadMsgToChild(ctx, intfID, onuID, uniID, uni, tpID, *(TpInst.(*tp_pb.TechProfileInstance))); err != nil {
 			logger.Warn(ctx, err)
 		}
 	}()
 }
 
 func (f *OpenOltFlowMgr) isGemPortUsedByAnotherFlow(gemPortID uint32) bool {
-	f.flowsUsedByGemPortKey.RLock()
-	flowIDList := f.flowsUsedByGemPort[gemPortID]
-	f.flowsUsedByGemPortKey.RUnlock()
+	f.gemToFlowIDsKey.RLock()
+	flowIDList := f.gemToFlowIDs[gemPortID]
+	f.gemToFlowIDsKey.RUnlock()
 	return len(flowIDList) > 1
 
 }
 
-func (f *OpenOltFlowMgr) isTechProfileUsedByAnotherGem(ctx context.Context, ponIntf uint32, onuID uint32, uniID uint32, tpInst *tp.TechProfile, gemPortID uint32) (bool, uint32) {
+func (f *OpenOltFlowMgr) isTechProfileUsedByAnotherGem(ctx context.Context, ponIntf uint32, onuID uint32, uniID uint32, tpInst *tp_pb.TechProfileInstance, gemPortID uint32) (bool, uint32) {
 	currentGemPorts := f.resourceMgr.GetCurrentGEMPortIDsForOnu(ctx, ponIntf, onuID, uniID)
 	tpGemPorts := tpInst.UpstreamGemPortAttributeList
 	for _, currentGemPort := range currentGemPorts {
 		for _, tpGemPort := range tpGemPorts {
-			if (currentGemPort == tpGemPort.GemportID) && (currentGemPort != gemPortID) {
+			if (currentGemPort == tpGemPort.GemportId) && (currentGemPort != gemPortID) {
 				return true, currentGemPort
 			}
 		}
@@ -3010,21 +2803,21 @@
 }
 
 func (f *OpenOltFlowMgr) isAllocUsedByAnotherUNI(ctx context.Context, sq schedQueue) bool {
-	tpInst := sq.tpInst.(*tp.TechProfile)
-	if tpInst.InstanceCtrl.Onu == "single-instance" && sq.direction == tp_pb.Direction_UPSTREAM {
-		tpInstances := f.techprofile[sq.intfID].FindAllTpInstances(ctx, f.deviceHandler.device.Id, sq.tpID, sq.intfID, sq.onuID).([]tp.TechProfile)
+	tpInst := sq.tpInst.(*tp_pb.TechProfileInstance)
+	if tpInst.InstanceControl.Onu == "single-instance" && sq.direction == tp_pb.Direction_UPSTREAM {
+		tpInstances := f.techprofile.FindAllTpInstances(ctx, f.deviceHandler.device.Id, sq.tpID, sq.intfID, sq.onuID).([]tp_pb.TechProfileInstance)
 		logger.Debugw(ctx, "got-single-instance-tp-instances", log.Fields{"tp-instances": tpInstances})
 		for i := 0; i < len(tpInstances); i++ {
 			tpI := tpInstances[i]
 			if tpI.SubscriberIdentifier != tpInst.SubscriberIdentifier &&
-				tpI.UsScheduler.AllocID == tpInst.UsScheduler.AllocID {
+				tpI.UsScheduler.AllocId == tpInst.UsScheduler.AllocId {
 				logger.Debugw(ctx, "alloc-is-in-use",
 					log.Fields{
 						"device-id": f.deviceHandler.device.Id,
 						"intfID":    sq.intfID,
 						"onuID":     sq.onuID,
 						"uniID":     sq.uniID,
-						"allocID":   tpI.UsScheduler.AllocID,
+						"allocID":   tpI.UsScheduler.AllocId,
 					})
 				return true
 			}
@@ -3250,7 +3043,7 @@
 			logger.Debugw(ctx, "invalid-action-port-number",
 				log.Fields{
 					"port-number": action[Output].(uint32),
-					"error":       err})
+					"err":         err})
 			return uint32(0), err
 		}
 		logger.Infow(ctx, "output-nni-intfId-is", log.Fields{"intf-id": intfID})
@@ -3261,7 +3054,7 @@
 			logger.Debugw(ctx, "invalid-classifier-port-number",
 				log.Fields{
 					"port-number": action[Output].(uint32),
-					"error":       err})
+					"err":         err})
 			return uint32(0), err
 		}
 		logger.Infow(ctx, "input-nni-intfId-is", log.Fields{"intf-id": intfID})
@@ -3331,69 +3124,39 @@
 	return 0, 0, nil
 }
 
-// AddUniPortToOnuInfo adds uni port to the onugem info both in cache and kvstore.
-func (f *OpenOltFlowMgr) AddUniPortToOnuInfo(ctx context.Context, intfID uint32, onuID uint32, portNum uint32) {
-
-	f.onuGemInfoLock.Lock()
-	defer f.onuGemInfoLock.Unlock()
-
-	onugem := f.onuGemInfo
-	for idx, onu := range onugem {
-		if onu.OnuID == onuID {
-			for _, uni := range onu.UniPorts {
-				if uni == portNum {
-					logger.Infow(ctx, "uni-already-in-cache--no-need-to-update-cache-and-kv-store", log.Fields{"uni": portNum})
-					return
+func (f *OpenOltFlowMgr) loadFlowIDsForGemAndGemIDsForFlow(ctx context.Context) {
+	logger.Debug(ctx, "loadFlowIDsForGemAndGemIDsForFlow - start")
+	f.onuGemInfoLock.RLock()
+	f.gemToFlowIDsKey.Lock()
+	f.flowIDToGemsLock.Lock()
+	for _, og := range f.onuGemInfoMap {
+		for _, gem := range og.GemPorts {
+			flowIDs, err := f.resourceMgr.GetFlowIDsForGem(ctx, f.ponPortIdx, gem)
+			if err != nil {
+				f.gemToFlowIDs[gem] = flowIDs
+				for _, flowID := range flowIDs {
+					if _, ok := f.flowIDToGems[flowID]; !ok {
+						f.flowIDToGems[flowID] = []uint32{gem}
+					} else {
+						f.flowIDToGems[flowID] = appendUnique32bit(f.flowIDToGems[flowID], gem)
+					}
 				}
 			}
-			onugem[idx].UniPorts = append(onugem[idx].UniPorts, portNum)
-			f.onuGemInfo = onugem
 		}
 	}
-	f.resourceMgr.AddUniPortToOnuInfo(ctx, intfID, onuID, portNum)
-
-}
-
-func (f *OpenOltFlowMgr) loadFlowIDlistForGem(ctx context.Context, intf uint32) {
-	flowIDsList, err := f.resourceMgr.GetFlowIDsGemMapForInterface(ctx, intf)
-	if err != nil {
-		logger.Error(ctx, "failed-to-get-flowid-list-per-gem", log.Fields{"intf": intf})
-		return
-	}
-	f.flowsUsedByGemPortKey.Lock()
-	for gem, FlowIDs := range flowIDsList {
-		f.flowsUsedByGemPort[gem] = FlowIDs
-	}
-	f.flowsUsedByGemPortKey.Unlock()
+	f.flowIDToGemsLock.Unlock()
+	f.gemToFlowIDsKey.Unlock()
+	f.onuGemInfoLock.RUnlock()
+	logger.Debug(ctx, "loadFlowIDsForGemAndGemIDsForFlow - end")
 }
 
 //clearMulticastFlowFromResourceManager  removes a multicast flow from the KV store and
 // clears resources reserved for this multicast flow
 func (f *OpenOltFlowMgr) clearMulticastFlowFromResourceManager(ctx context.Context, flow *ofp.OfpFlowStats) error {
-	classifierInfo := make(map[string]interface{})
-	var flowInfo *rsrcMgr.FlowInfo
-	formulateClassifierInfoFromFlow(ctx, classifierInfo, flow)
-	networkInterfaceID, err := f.getNNIInterfaceIDOfMulticastFlow(ctx, classifierInfo)
-
-	if err != nil {
-		logger.Warnw(ctx, "no-inport-found--cannot-release-resources-of-the-multicast-flow", log.Fields{"flowId:": flow.Id})
-		return err
-	}
-
-	var onuID = int32(NoneOnuID)
-	var uniID = int32(NoneUniID)
-	if flowInfo = f.resourceMgr.GetFlowIDInfo(ctx, networkInterfaceID, onuID, uniID, flow.Id); flowInfo == nil {
-		return olterrors.NewErrPersistence("remove", "flow", flow.Id,
-			log.Fields{
-				"flow":      flow,
-				"device-id": f.deviceHandler.device.Id,
-				"intf-id":   networkInterfaceID,
-				"onu-id":    onuID}, err).Log()
-	}
-	removeFlowMessage := openoltpb2.Flow{FlowId: flow.Id, FlowType: flowInfo.Flow.FlowType}
+	removeFlowMessage := openoltpb2.Flow{FlowId: flow.Id, FlowType: Multicast}
 	logger.Debugw(ctx, "multicast-flow-to-be-deleted",
 		log.Fields{
-			"flow":      flowInfo.Flow,
+			"flow":      flow,
 			"flow-id":   flow.Id,
 			"device-id": f.deviceHandler.device.Id})
 	// Remove from device
@@ -3402,60 +3165,44 @@
 		logger.Errorw(ctx, "failed-to-remove-multicast-flow",
 			log.Fields{
 				"flow-id": flow.Id,
-				"error":   err})
+				"err":     err})
 		return err
 	}
-	// Remove flow from KV store
-	return f.resourceMgr.RemoveFlowIDInfo(ctx, networkInterfaceID, onuID, uniID, flow.Id)
+
+	return nil
 }
 
-// reconcileSubscriberDataPathFlowIDMap reconciles subscriberDataPathFlowIDMap from KV store
-func (f *OpenOltFlowMgr) reconcileSubscriberDataPathFlowIDMap(ctx context.Context) {
-	onuGemInfo, err := f.resourceMgr.GetOnuGemInfo(ctx, f.ponPortIdx)
+func (f *OpenOltFlowMgr) getTechProfileDownloadMessage(ctx context.Context, tpPath string, ponID uint32, onuID uint32, uniID uint32) *ic.InterAdapterTechProfileDownloadMessage {
+	tpInst, err := f.techprofile.GetTPInstance(ctx, tpPath)
 	if err != nil {
-		_ = olterrors.NewErrNotFound("onu", log.Fields{
-			"pon-port": f.ponPortIdx}, err).Log()
-		return
+		logger.Errorw(ctx, "error-fetching-tp-instance", log.Fields{"tpPath": tpPath})
+		return nil
 	}
 
-	f.subscriberDataPathFlowIDMapLock.Lock()
-	defer f.subscriberDataPathFlowIDMapLock.Unlock()
-
-	for _, onu := range onuGemInfo {
-		for _, uniID := range onu.UniPorts {
-			flowIDs, err := f.resourceMgr.GetCurrentFlowIDsForOnu(ctx, onu.IntfID, int32(onu.OnuID), int32(uniID))
-			if err != nil {
-				logger.Fatalf(ctx, "failed-to-read-flow-ids-of-onu-during-reconciliation")
-			}
-			for _, flowID := range flowIDs {
-				flowInfo := f.resourceMgr.GetFlowIDInfo(ctx, onu.IntfID, int32(onu.OnuID), int32(uniID), flowID)
-				if flowInfo == nil {
-					// Error is already logged in the called function
-					continue
-				}
-				if flowInfo.Flow.Classifier.PktTagType == DoubleTag &&
-					flowInfo.Flow.FlowType == Downstream &&
-					flowInfo.Flow.Classifier.OVid > 0 &&
-					flowInfo.Flow.TechProfileId > 0 {
-					key := subscriberDataPathFlowIDKey{intfID: onu.IntfID, onuID: onu.OnuID, uniID: uniID, direction: flowInfo.Flow.FlowType, tpID: flowInfo.Flow.TechProfileId}
-					if _, ok := f.subscriberDataPathFlowIDMap[key]; !ok {
-						f.subscriberDataPathFlowIDMap[key] = flowInfo.Flow.FlowId
-					}
-				} else if flowInfo.Flow.Classifier.PktTagType == SingleTag &&
-					flowInfo.Flow.FlowType == Upstream &&
-					flowInfo.Flow.Action.OVid > 0 &&
-					flowInfo.Flow.TechProfileId > 0 {
-					key := subscriberDataPathFlowIDKey{intfID: onu.IntfID, onuID: onu.OnuID, uniID: uniID, direction: flowInfo.Flow.FlowType, tpID: flowInfo.Flow.TechProfileId}
-					if _, ok := f.subscriberDataPathFlowIDMap[key]; !ok {
-						f.subscriberDataPathFlowIDMap[key] = flowInfo.Flow.FlowId
-					}
-				}
-			}
+	switch tpInst := tpInst.(type) {
+	case *tp_pb.TechProfileInstance:
+		logger.Debugw(ctx, "fetched-tp-instance-successfully--formulating-tp-download-msg", log.Fields{"tpPath": tpPath})
+		return &ic.InterAdapterTechProfileDownloadMessage{UniId: uniID,
+			TpInstancePath: tpPath,
+			TechTpInstance: &ic.InterAdapterTechProfileDownloadMessage_TpInstance{TpInstance: tpInst},
 		}
+	case *openoltpb2.EponTechProfileInstance:
+		return &ic.InterAdapterTechProfileDownloadMessage{UniId: uniID,
+			TpInstancePath: tpPath,
+			TechTpInstance: &ic.InterAdapterTechProfileDownloadMessage_EponTpInstance{EponTpInstance: tpInst},
+		}
+	default:
+		logger.Errorw(ctx, "unknown-tech", log.Fields{"tpPath": tpPath})
 	}
+	return nil
 }
 
-// isDatapathFlow declares a flow as datapath flow if it is not a controller bound flow and the flow does not have group
-func isDatapathFlow(flow *ofp.OfpFlowStats) bool {
-	return !IsControllerBoundFlow(flows.GetOutPort(flow)) && !flows.HasGroup(flow)
+func (f *OpenOltFlowMgr) getOnuGemInfoList() []rsrcMgr.OnuGemInfo {
+	var onuGemInfoLst []rsrcMgr.OnuGemInfo
+	f.onuGemInfoLock.RLock()
+	defer f.onuGemInfoLock.RUnlock()
+	for _, v := range f.onuGemInfoMap {
+		onuGemInfoLst = append(onuGemInfoLst, *v)
+	}
+	return onuGemInfoLst
 }
diff --git a/internal/pkg/core/openolt_flowmgr_test.go b/internal/pkg/core/openolt_flowmgr_test.go
index 44a02fb..214fa61 100644
--- a/internal/pkg/core/openolt_flowmgr_test.go
+++ b/internal/pkg/core/openolt_flowmgr_test.go
@@ -29,15 +29,10 @@
 
 	"github.com/opencord/voltha-protos/v4/go/voltha"
 
-	"github.com/opencord/voltha-lib-go/v4/pkg/db"
-	fu "github.com/opencord/voltha-lib-go/v4/pkg/flows"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
-	tp "github.com/opencord/voltha-lib-go/v4/pkg/techprofile"
-	"github.com/opencord/voltha-openolt-adapter/internal/pkg/resourcemanager"
+	fu "github.com/opencord/voltha-lib-go/v5/pkg/flows"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	rsrcMgr "github.com/opencord/voltha-openolt-adapter/internal/pkg/resourcemanager"
-	"github.com/opencord/voltha-openolt-adapter/pkg/mocks"
 	ofp "github.com/opencord/voltha-protos/v4/go/openflow_13"
-	"github.com/opencord/voltha-protos/v4/go/openolt"
 	openoltpb2 "github.com/opencord/voltha-protos/v4/go/openolt"
 	tp_pb "github.com/opencord/voltha-protos/v4/go/tech_profile"
 )
@@ -48,41 +43,11 @@
 	_, _ = log.SetDefaultLogger(log.JSON, log.DebugLevel, nil)
 	flowMgr = newMockFlowmgr()
 }
-func newMockResourceMgr() *resourcemanager.OpenOltResourceMgr {
-	ranges := []*openolt.DeviceInfo_DeviceResourceRanges{
-		{
-			IntfIds:    []uint32{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},
-			Technology: "Default",
-		},
-	}
-
-	deviceinfo := &openolt.DeviceInfo{Vendor: "openolt", Model: "openolt", HardwareVersion: "1.0", FirmwareVersion: "1.0",
-		DeviceId: "olt", DeviceSerialNumber: "openolt", PonPorts: 16, Technology: "Default",
-		OnuIdStart: OnuIDStart, OnuIdEnd: OnuIDEnd, AllocIdStart: AllocIDStart, AllocIdEnd: AllocIDEnd,
-		GemportIdStart: GemIDStart, GemportIdEnd: GemIDEnd, FlowIdStart: FlowIDStart, FlowIdEnd: FlowIDEnd,
-		Ranges: ranges,
-	}
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-	rsrMgr := resourcemanager.NewResourceMgr(ctx, "olt", "127.0.0.1:2379", "etcd", "olt", deviceinfo, "service/voltha")
-	for key := range rsrMgr.ResourceMgrs {
-		rsrMgr.ResourceMgrs[key].KVStore = &db.Backend{}
-		rsrMgr.ResourceMgrs[key].KVStore.Client = &mocks.MockKVClient{}
-		rsrMgr.ResourceMgrs[key].TechProfileMgr = mocks.MockTechProfile{TpID: key}
-	}
-	return rsrMgr
-}
 
 func newMockFlowmgr() []*OpenOltFlowMgr {
-	rMgr := newMockResourceMgr()
 	dh := newMockDeviceHandler()
 
-	rMgr.KVStore = &db.Backend{}
-	rMgr.KVStore.Client = &mocks.MockKVClient{}
-
-	dh.resourceMgr = rMgr
-
-	// onuGemInfo := make([]rsrcMgr.OnuGemInfo, NumPonPorts)
+	// onuGemInfoMap := make([]rsrcMgr.onuGemInfoMap, NumPonPorts)
 	var i uint32
 
 	for i = 0; i < NumPonPorts; i++ {
@@ -90,11 +55,7 @@
 		packetInGemPort[rsrcMgr.PacketInInfoKey{IntfID: i, OnuID: i + 1, LogicalPort: i + 1, VlanID: uint16(i), Priority: uint8(i)}] = i + 1
 
 		dh.flowMgr[i].packetInGemPort = packetInGemPort
-		tps := make(map[uint32]tp.TechProfileIf)
-		for key := range rMgr.ResourceMgrs {
-			tps[key] = mocks.MockTechProfile{TpID: key}
-		}
-		dh.flowMgr[i].techprofile = tps
+		dh.flowMgr[i].techprofile = dh.resourceMgr[i].PonRsrMgr.TechProfileMgr
 		interface2mcastQeueuMap := make(map[uint32]*QueueInfoBrief)
 		interface2mcastQeueuMap[0] = &QueueInfoBrief{
 			gemPortID:       4000,
@@ -102,21 +63,22 @@
 		}
 		dh.flowMgr[i].grpMgr.interfaceToMcastQueueMap = interface2mcastQeueuMap
 	}
-
 	return dh.flowMgr
 }
 
 func TestOpenOltFlowMgr_CreateSchedulerQueues(t *testing.T) {
-	tprofile := &tp.TechProfile{Name: "tp1", SubscriberIdentifier: "subscriber1",
+	tprofile := &tp_pb.TechProfileInstance{Name: "tp1", SubscriberIdentifier: "subscriber1",
 		ProfileType: "pt1", NumGemPorts: 1, Version: 1,
-		InstanceCtrl: tp.InstanceControl{Onu: "1", Uni: "1", MaxGemPayloadSize: "1"},
+		InstanceControl: &tp_pb.InstanceControl{Onu: "1", Uni: "1", MaxGemPayloadSize: "1"},
 	}
-	tprofile.UsScheduler.Direction = "UPSTREAM"
-	tprofile.UsScheduler.QSchedPolicy = "WRR"
+	tprofile.UsScheduler = &openoltpb2.SchedulerAttributes{}
+	tprofile.UsScheduler.Direction = tp_pb.Direction_UPSTREAM
+	tprofile.UsScheduler.QSchedPolicy = tp_pb.SchedulingPolicy_WRR
 
 	tprofile2 := tprofile
-	tprofile2.DsScheduler.Direction = "DOWNSTREAM"
-	tprofile2.DsScheduler.QSchedPolicy = "WRR"
+	tprofile2.DsScheduler = &openoltpb2.SchedulerAttributes{}
+	tprofile2.DsScheduler.Direction = tp_pb.Direction_DOWNSTREAM
+	tprofile2.DsScheduler.QSchedPolicy = tp_pb.SchedulingPolicy_WRR
 
 	tests := []struct {
 		name       string
@@ -135,17 +97,17 @@
 		{"CreateSchedulerQueues-19", schedQueue{tp_pb.Direction_UPSTREAM, 0, 1, 1, 64, 1, tprofile, 1, createFlowMetadata(tprofile, 5, Upstream)}, false},
 		{"CreateSchedulerQueues-20", schedQueue{tp_pb.Direction_DOWNSTREAM, 0, 1, 1, 65, 1, tprofile2, 1, createFlowMetadata(tprofile2, 5, Downstream)}, false},
 
-		{"CreateSchedulerQueues-1", schedQueue{tp_pb.Direction_UPSTREAM, 0, 1, 1, 64, 1, tprofile, 1, createFlowMetadata(tprofile, 0, Upstream)}, true},
-		{"CreateSchedulerQueues-2", schedQueue{tp_pb.Direction_DOWNSTREAM, 0, 1, 1, 65, 1, tprofile2, 1, createFlowMetadata(tprofile2, 0, Downstream)}, true},
+		{"CreateSchedulerQueues-1", schedQueue{tp_pb.Direction_UPSTREAM, 0, 1, 1, 64, 1, tprofile, 1, createFlowMetadata(tprofile, 0, Upstream)}, false},
+		{"CreateSchedulerQueues-2", schedQueue{tp_pb.Direction_DOWNSTREAM, 0, 1, 1, 65, 1, tprofile2, 1, createFlowMetadata(tprofile2, 0, Downstream)}, false},
 		{"CreateSchedulerQueues-3", schedQueue{tp_pb.Direction_UPSTREAM, 0, 1, 1, 64, 1, tprofile, 2, createFlowMetadata(tprofile, 2, Upstream)}, true},
 		{"CreateSchedulerQueues-4", schedQueue{tp_pb.Direction_DOWNSTREAM, 0, 1, 1, 65, 1, tprofile2, 2, createFlowMetadata(tprofile2, 2, Downstream)}, true},
 		{"CreateSchedulerQueues-5", schedQueue{tp_pb.Direction_UPSTREAM, 1, 2, 2, 64, 2, tprofile, 2, createFlowMetadata(tprofile, 3, Upstream)}, true},
 		{"CreateSchedulerQueues-6", schedQueue{tp_pb.Direction_DOWNSTREAM, 1, 2, 2, 65, 2, tprofile2, 2, createFlowMetadata(tprofile2, 3, Downstream)}, true},
 
 		//Negative testcases
-		{"CreateSchedulerQueues-7", schedQueue{tp_pb.Direction_UPSTREAM, 0, 1, 1, 64, 1, tprofile, 1, &voltha.FlowMetadata{}}, true},
+		{"CreateSchedulerQueues-7", schedQueue{tp_pb.Direction_UPSTREAM, 0, 1, 1, 64, 1, tprofile, 1, &voltha.FlowMetadata{}}, false},
 		{"CreateSchedulerQueues-8", schedQueue{tp_pb.Direction_UPSTREAM, 0, 1, 1, 64, 1, tprofile, 0, &voltha.FlowMetadata{}}, true},
-		{"CreateSchedulerQueues-9", schedQueue{tp_pb.Direction_DOWNSTREAM, 0, 1, 1, 65, 1, tprofile2, 1, &voltha.FlowMetadata{}}, true},
+		{"CreateSchedulerQueues-9", schedQueue{tp_pb.Direction_DOWNSTREAM, 0, 1, 1, 65, 1, tprofile2, 1, &voltha.FlowMetadata{}}, false},
 		{"CreateSchedulerQueues-10", schedQueue{tp_pb.Direction_UPSTREAM, 0, 1, 1, 64, 1, tprofile, 2, &voltha.FlowMetadata{}}, true},
 		{"CreateSchedulerQueues-11", schedQueue{tp_pb.Direction_DOWNSTREAM, 0, 1, 1, 65, 1, tprofile2, 2, &voltha.FlowMetadata{}}, true},
 		{"CreateSchedulerQueues-12", schedQueue{tp_pb.Direction_DOWNSTREAM, 0, 1, 1, 65, 1, tprofile2, 2, nil}, true},
@@ -161,35 +123,35 @@
 	}
 }
 
-func createFlowMetadata(techProfile *tp.TechProfile, tcontType int, direction string) *voltha.FlowMetadata {
-	var additionalBw string
+func createFlowMetadata(techProfile *tp_pb.TechProfileInstance, tcontType int, direction string) *voltha.FlowMetadata {
+	var additionalBw openoltpb2.AdditionalBW
 	bands := make([]*ofp.OfpMeterBandHeader, 0)
 	switch tcontType {
 	case 1:
 		//tcont-type-1
 		bands = append(bands, &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 10000, BurstSize: 0, Data: &ofp.OfpMeterBandHeader_Drop{}})
 		bands = append(bands, &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 10000, BurstSize: 0, Data: &ofp.OfpMeterBandHeader_Drop{}})
-		additionalBw = "AdditionalBW_None"
+		additionalBw = tp_pb.AdditionalBW_AdditionalBW_None
 	case 2:
 		//tcont-type-2
 		bands = append(bands, &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 60000, BurstSize: 10000, Data: &ofp.OfpMeterBandHeader_Drop{}})
 		bands = append(bands, &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 50000, BurstSize: 10000, Data: &ofp.OfpMeterBandHeader_Drop{}})
-		additionalBw = "AdditionalBW_None"
+		additionalBw = tp_pb.AdditionalBW_AdditionalBW_None
 	case 3:
 		//tcont-type-3
 		bands = append(bands, &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 100000, BurstSize: 10000, Data: &ofp.OfpMeterBandHeader_Drop{}})
 		bands = append(bands, &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 50000, BurstSize: 20000, Data: &ofp.OfpMeterBandHeader_Drop{}})
-		additionalBw = "AdditionalBW_NA"
+		additionalBw = tp_pb.AdditionalBW_AdditionalBW_NA
 	case 4:
 		//tcont-type-4
 		bands = append(bands, &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 200000, BurstSize: 10000, Data: &ofp.OfpMeterBandHeader_Drop{}})
-		additionalBw = "AdditionalBW_BestEffort"
+		additionalBw = tp_pb.AdditionalBW_AdditionalBW_BestEffort
 	case 5:
 		//tcont-type-5
 		bands = append(bands, &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 50000, BurstSize: 10000, Data: &ofp.OfpMeterBandHeader_Drop{}})
 		bands = append(bands, &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 100000, BurstSize: 10000, Data: &ofp.OfpMeterBandHeader_Drop{}})
 		bands = append(bands, &ofp.OfpMeterBandHeader{Type: ofp.OfpMeterBandType_OFPMBT_DROP, Rate: 10000, BurstSize: 0, Data: &ofp.OfpMeterBandHeader_Drop{}})
-		additionalBw = "AdditionalBW_BestEffort"
+		additionalBw = tp_pb.AdditionalBW_AdditionalBW_BestEffort
 	default:
 		// do nothing, we will return meter config with no meter bands
 	}
@@ -206,18 +168,20 @@
 }
 
 func TestOpenOltFlowMgr_RemoveSchedulerQueues(t *testing.T) {
-	tprofile := &tp.TechProfile{Name: "tp1", SubscriberIdentifier: "subscriber1",
+	tprofile := &tp_pb.TechProfileInstance{Name: "tp1", SubscriberIdentifier: "subscriber1",
 		ProfileType: "pt1", NumGemPorts: 1, Version: 1,
-		InstanceCtrl: tp.InstanceControl{Onu: "1", Uni: "1", MaxGemPayloadSize: "1"},
+		InstanceControl: &tp_pb.InstanceControl{Onu: "1", Uni: "1", MaxGemPayloadSize: "1"},
 	}
-	tprofile.UsScheduler.Direction = "UPSTREAM"
-	tprofile.UsScheduler.AdditionalBw = "AdditionalBW_None"
-	tprofile.UsScheduler.QSchedPolicy = "WRR"
+	tprofile.UsScheduler = &openoltpb2.SchedulerAttributes{}
+	tprofile.UsScheduler.Direction = tp_pb.Direction_UPSTREAM
+	tprofile.UsScheduler.AdditionalBw = tp_pb.AdditionalBW_AdditionalBW_None
+	tprofile.UsScheduler.QSchedPolicy = tp_pb.SchedulingPolicy_WRR
 
 	tprofile2 := tprofile
-	tprofile2.DsScheduler.Direction = "DOWNSTREAM"
-	tprofile2.DsScheduler.AdditionalBw = "AdditionalBW_None"
-	tprofile2.DsScheduler.QSchedPolicy = "WRR"
+	tprofile2.DsScheduler = &openoltpb2.SchedulerAttributes{}
+	tprofile2.DsScheduler.Direction = tp_pb.Direction_DOWNSTREAM
+	tprofile2.DsScheduler.AdditionalBw = tp_pb.AdditionalBW_AdditionalBW_None
+	tprofile2.DsScheduler.QSchedPolicy = tp_pb.SchedulingPolicy_WRR
 	//defTprofile := &tp.DefaultTechProfile{}
 	tests := []struct {
 		name       string
@@ -267,7 +231,6 @@
 		args args
 	}{
 		{"createTcontGemports-1", args{intfID: 0, onuID: 1, uniID: 1, uni: "16", uniPort: 1, TpID: 64, UsMeterID: 1, DsMeterID: 1, flowMetadata: flowmetadata}},
-		{"createTcontGemports-1", args{intfID: 0, onuID: 1, uniID: 1, uni: "16", uniPort: 1, TpID: 65, UsMeterID: 1, DsMeterID: 1, flowMetadata: flowmetadata}},
 	}
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
@@ -275,11 +238,11 @@
 		t.Run(tt.name, func(t *testing.T) {
 			_, _, tpInst := flowMgr[tt.args.intfID].createTcontGemports(ctx, tt.args.intfID, tt.args.onuID, tt.args.uniID, tt.args.uni, tt.args.uniPort, tt.args.TpID, tt.args.UsMeterID, tt.args.DsMeterID, tt.args.flowMetadata)
 			switch tpInst := tpInst.(type) {
-			case *tp.TechProfile:
+			case *tp_pb.TechProfileInstance:
 				if tt.args.TpID != 64 {
 					t.Errorf("OpenOltFlowMgr.createTcontGemports() error = different tech, tech %v", tpInst)
 				}
-			case *tp.EponProfile:
+			case *tp_pb.EponTechProfileInstance:
 				if tt.args.TpID != 65 {
 					t.Errorf("OpenOltFlowMgr.createTcontGemports() error = different tech, tech %v", tpInst)
 				}
@@ -680,7 +643,7 @@
 
 	// clean the flowMgr
 	for i := 0; i < intfNum; i++ {
-		flowMgr[i].onuGemInfo = make([]rsrcMgr.OnuGemInfo, 0)
+		flowMgr[i].onuGemInfoMap = make(map[uint32]*rsrcMgr.OnuGemInfo)
 	}
 
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
@@ -696,7 +659,6 @@
 
 	// Add gemPorts to OnuInfo in parallel threads
 	wg := sync.WaitGroup{}
-
 	for o := 1; o <= onuNum; o++ {
 		for i := 0; i < intfNum; i++ {
 			wg.Add(1)
@@ -711,15 +673,15 @@
 
 	wg.Wait()
 
-	// check that each entry of onuGemInfo has the correct number of ONUs
+	// check that each entry of onuGemInfoMap has the correct number of ONUs
 	for i := 0; i < intfNum; i++ {
-		lenofOnu := len(flowMgr[i].onuGemInfo)
+		lenofOnu := len(flowMgr[i].onuGemInfoMap)
 		if onuNum != lenofOnu {
-			t.Errorf("OnuGemInfo length is not as expected len = %d, want %d", lenofOnu, onuNum)
+			t.Errorf("onuGemInfoMap length is not as expected len = %d, want %d", lenofOnu, onuNum)
 		}
 
 		for o := 1; o <= onuNum; o++ {
-			lenOfGemPorts := len(flowMgr[i].onuGemInfo[o-1].GemPorts)
+			lenOfGemPorts := len(flowMgr[i].onuGemInfoMap[uint32(o)].GemPorts)
 			// check that each onuEntry has 1 gemPort
 			if lenOfGemPorts != 1 {
 				t.Errorf("Expected 1 GemPort per ONU, found %d", lenOfGemPorts)
@@ -727,7 +689,7 @@
 
 			// check that the value of the gemport is correct
 			gemID, _ := strconv.Atoi(fmt.Sprintf("90%d%d", i, o-1))
-			currentValue := flowMgr[i].onuGemInfo[o-1].GemPorts[0]
+			currentValue := flowMgr[i].onuGemInfoMap[uint32(o)].GemPorts[0]
 			if uint32(gemID) != currentValue {
 				t.Errorf("Expected GemPort value to be %d, found %d", gemID, currentValue)
 			}
@@ -774,11 +736,11 @@
 			for _, gemPortDeleted := range tt.args.gemPortIDsToBeDeleted {
 				flowMgr[tt.args.intfID].deleteGemPortFromLocalCache(ctx, tt.args.intfID, tt.args.onuID, gemPortDeleted)
 			}
-			lenofGemPorts := len(flowMgr[tt.args.intfID].onuGemInfo[0].GemPorts)
+			lenofGemPorts := len(flowMgr[tt.args.intfID].onuGemInfoMap[1].GemPorts)
 			if lenofGemPorts != tt.args.finalLength {
 				t.Errorf("GemPorts length is not as expected len = %d, want %d", lenofGemPorts, tt.args.finalLength)
 			}
-			gemPorts := flowMgr[tt.args.intfID].onuGemInfo[0].GemPorts
+			gemPorts := flowMgr[tt.args.intfID].onuGemInfoMap[1].GemPorts
 			if !reflect.DeepEqual(tt.args.gemPortIDsRemaining, gemPorts) {
 				t.Errorf("GemPorts are not as expected = %v, want %v", gemPorts, tt.args.gemPortIDsRemaining)
 			}
@@ -798,11 +760,11 @@
 		wantErr bool
 	}{
 		// TODO: Add test cases.
-		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "pon", IntfId: 0, GemportId: 255, FlowId: 100, PortNo: 1, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 1, false},
-		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "nni", IntfId: 0, GemportId: 1, FlowId: 100, PortNo: 1, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 1048576, false},
+		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "pon", IntfId: 0, GemportId: 255, OnuId: 1, UniId: 0, FlowId: 100, PortNo: 1, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 1, false},
+		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "nni", IntfId: 0, GemportId: 1, OnuId: 1, UniId: 0, FlowId: 100, PortNo: 1, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 1048576, false},
 		// Negative Test cases.
-		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "pon", IntfId: 1, GemportId: 1, FlowId: 100, PortNo: 1, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 0, true},
-		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "pon", IntfId: 0, GemportId: 257, FlowId: 100, PortNo: 0, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 16, false},
+		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "pon", IntfId: 1, GemportId: 1, OnuId: 1, UniId: 0, FlowId: 100, PortNo: 1, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 1, false},
+		{"GetLogicalPortFromPacketIn", args{packetIn: &openoltpb2.PacketIndication{IntfType: "pon", IntfId: 0, GemportId: 257, OnuId: 1, UniId: 0, FlowId: 100, PortNo: 0, Cookie: 100, Pkt: []byte("GetLogicalPortFromPacketIn")}}, 16, false},
 	}
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
@@ -1067,51 +1029,55 @@
 		// So just return in case of error
 		return
 	}
-
-	TpInst := &tp.TechProfile{
+	/*
+		usGemList := make([]*tp_pb.GemPortAttributes, 4)
+		usGemList = append(usGemList, &tp_pb.GemPortAttributes{})
+		usGemList = append(usGemList, &tp_pb.GemPortAttributes{})
+		usGemList = append(usGemList, &tp_pb.GemPortAttributes{})
+		usGemList = append(usGemList, &tp_pb.GemPortAttributes{})
+		dsGemList := make([]*tp_pb.GemPortAttributes, 4)
+		dsGemList = append(usGemList, &tp_pb.GemPortAttributes{})
+		dsGemList = append(usGemList, &tp_pb.GemPortAttributes{})
+		dsGemList = append(usGemList, &tp_pb.GemPortAttributes{})
+		dsGemList = append(usGemList, &tp_pb.GemPortAttributes{})
+	*/
+	TpInst := &tp_pb.TechProfileInstance{
 		Name:                 "Test-Tech-Profile",
 		SubscriberIdentifier: "257",
 		ProfileType:          "Mock",
 		Version:              1,
 		NumGemPorts:          4,
-		InstanceCtrl: tp.InstanceControl{
+		InstanceControl: &tp_pb.InstanceControl{
 			Onu: "1",
 			Uni: "16",
 		},
+		UsScheduler: &openoltpb2.SchedulerAttributes{},
+		DsScheduler: &openoltpb2.SchedulerAttributes{},
 	}
 	TpInst.UsScheduler.Priority = 1
-	TpInst.UsScheduler.Direction = "upstream"
-	TpInst.UsScheduler.AllocID = 1
-	TpInst.UsScheduler.AdditionalBw = "None"
-	TpInst.UsScheduler.QSchedPolicy = "PQ"
+	TpInst.UsScheduler.Direction = tp_pb.Direction_UPSTREAM
+	TpInst.UsScheduler.AllocId = 1
+	TpInst.UsScheduler.AdditionalBw = tp_pb.AdditionalBW_AdditionalBW_None
+	TpInst.UsScheduler.QSchedPolicy = tp_pb.SchedulingPolicy_WRR
 	TpInst.UsScheduler.Weight = 4
 
 	TpInst.DsScheduler.Priority = 1
-	TpInst.DsScheduler.Direction = "upstream"
-	TpInst.DsScheduler.AllocID = 1
-	TpInst.DsScheduler.AdditionalBw = "None"
-	TpInst.DsScheduler.QSchedPolicy = "PQ"
+	TpInst.DsScheduler.Direction = tp_pb.Direction_DOWNSTREAM
+	TpInst.DsScheduler.AllocId = 1
+	TpInst.DsScheduler.AdditionalBw = tp_pb.AdditionalBW_AdditionalBW_None
+	TpInst.DsScheduler.QSchedPolicy = tp_pb.SchedulingPolicy_WRR
 	TpInst.DsScheduler.Weight = 4
+	TpInst.UpstreamGemPortAttributeList = make([]*tp_pb.GemPortAttributes, 0)
+	TpInst.UpstreamGemPortAttributeList = append(TpInst.UpstreamGemPortAttributeList, &tp_pb.GemPortAttributes{GemportId: 1, PbitMap: "0b00000011"})
+	TpInst.UpstreamGemPortAttributeList = append(TpInst.UpstreamGemPortAttributeList, &tp_pb.GemPortAttributes{GemportId: 2, PbitMap: "0b00001100"})
+	TpInst.UpstreamGemPortAttributeList = append(TpInst.UpstreamGemPortAttributeList, &tp_pb.GemPortAttributes{GemportId: 3, PbitMap: "0b00110000"})
+	TpInst.UpstreamGemPortAttributeList = append(TpInst.UpstreamGemPortAttributeList, &tp_pb.GemPortAttributes{GemportId: 4, PbitMap: "0b11000000"})
 
-	TpInst.UpstreamGemPortAttributeList = make([]tp.IGemPortAttribute, 4)
-	TpInst.UpstreamGemPortAttributeList[0].GemportID = 1
-	TpInst.UpstreamGemPortAttributeList[0].PbitMap = "0b00000011"
-	TpInst.UpstreamGemPortAttributeList[0].GemportID = 2
-	TpInst.UpstreamGemPortAttributeList[0].PbitMap = "0b00001100"
-	TpInst.UpstreamGemPortAttributeList[0].GemportID = 3
-	TpInst.UpstreamGemPortAttributeList[0].PbitMap = "0b00110000"
-	TpInst.UpstreamGemPortAttributeList[0].GemportID = 4
-	TpInst.UpstreamGemPortAttributeList[0].PbitMap = "0b11000000"
-
-	TpInst.DownstreamGemPortAttributeList = make([]tp.IGemPortAttribute, 4)
-	TpInst.DownstreamGemPortAttributeList[0].GemportID = 1
-	TpInst.DownstreamGemPortAttributeList[0].PbitMap = "0b00000011"
-	TpInst.DownstreamGemPortAttributeList[0].GemportID = 2
-	TpInst.DownstreamGemPortAttributeList[0].PbitMap = "0b00001100"
-	TpInst.DownstreamGemPortAttributeList[0].GemportID = 3
-	TpInst.DownstreamGemPortAttributeList[0].PbitMap = "0b00110000"
-	TpInst.DownstreamGemPortAttributeList[0].GemportID = 4
-	TpInst.DownstreamGemPortAttributeList[0].PbitMap = "0b11000000"
+	TpInst.DownstreamGemPortAttributeList = make([]*tp_pb.GemPortAttributes, 0)
+	TpInst.DownstreamGemPortAttributeList = append(TpInst.DownstreamGemPortAttributeList, &tp_pb.GemPortAttributes{GemportId: 1, PbitMap: "0b00000011"})
+	TpInst.DownstreamGemPortAttributeList = append(TpInst.DownstreamGemPortAttributeList, &tp_pb.GemPortAttributes{GemportId: 2, PbitMap: "0b00001100"})
+	TpInst.DownstreamGemPortAttributeList = append(TpInst.DownstreamGemPortAttributeList, &tp_pb.GemPortAttributes{GemportId: 3, PbitMap: "0b00110000"})
+	TpInst.DownstreamGemPortAttributeList = append(TpInst.DownstreamGemPortAttributeList, &tp_pb.GemPortAttributes{GemportId: 4, PbitMap: "0b11000000"})
 
 	type args struct {
 		args           map[string]uint32
@@ -1123,7 +1089,7 @@
 		onuID          uint32
 		uniID          uint32
 		portNo         uint32
-		TpInst         *tp.TechProfile
+		TpInst         *tp_pb.TechProfileInstance
 		allocID        []uint32
 		gemPorts       []uint32
 		TpID           uint32
diff --git a/internal/pkg/core/openolt_groupmgr.go b/internal/pkg/core/openolt_groupmgr.go
index a87073b..4f633a7 100644
--- a/internal/pkg/core/openolt_groupmgr.go
+++ b/internal/pkg/core/openolt_groupmgr.go
@@ -16,8 +16,8 @@
 
 import (
 	"context"
-	"github.com/opencord/voltha-lib-go/v4/pkg/flows"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/flows"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
 	rsrcMgr "github.com/opencord/voltha-openolt-adapter/internal/pkg/resourcemanager"
 	ofp "github.com/opencord/voltha-protos/v4/go/openflow_13"
diff --git a/internal/pkg/core/openolt_test.go b/internal/pkg/core/openolt_test.go
index 3933475..8665028 100644
--- a/internal/pkg/core/openolt_test.go
+++ b/internal/pkg/core/openolt_test.go
@@ -28,13 +28,13 @@
 	"reflect"
 	"testing"
 
-	conf "github.com/opencord/voltha-lib-go/v4/pkg/config"
+	conf "github.com/opencord/voltha-lib-go/v5/pkg/config"
 
-	com "github.com/opencord/voltha-lib-go/v4/pkg/adapters/common"
-	"github.com/opencord/voltha-lib-go/v4/pkg/events"
-	fu "github.com/opencord/voltha-lib-go/v4/pkg/flows"
-	"github.com/opencord/voltha-lib-go/v4/pkg/kafka"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	com "github.com/opencord/voltha-lib-go/v5/pkg/adapters/common"
+	"github.com/opencord/voltha-lib-go/v5/pkg/events"
+	fu "github.com/opencord/voltha-lib-go/v5/pkg/flows"
+	"github.com/opencord/voltha-lib-go/v5/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/config"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
 	ic "github.com/opencord/voltha-protos/v4/go/inter_container"
diff --git a/internal/pkg/core/statsmanager.go b/internal/pkg/core/statsmanager.go
index 42c60d7..4d7d52d 100755
--- a/internal/pkg/core/statsmanager.go
+++ b/internal/pkg/core/statsmanager.go
@@ -25,7 +25,7 @@
 	"sync"
 	"time"
 
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
 	"github.com/opencord/voltha-protos/v4/go/extension"
 	"github.com/opencord/voltha-protos/v4/go/openolt"
@@ -285,7 +285,7 @@
 	var Ports interface{}
 	Ports, _ = InitPorts(ctx, "nni", Dev.device.Id, 1)
 	StatMgr.NorthBoundPort, _ = Ports.(map[uint32]*NniPort)
-	NumPonPorts := Dev.resourceMgr.DevInfo.GetPonPorts()
+	NumPonPorts := Dev.resourceMgr[0].DevInfo.GetPonPorts()
 	Ports, _ = InitPorts(ctx, "pon", Dev.device.Id, NumPonPorts)
 	StatMgr.SouthBoundPort, _ = Ports.(map[uint32]*PonPort)
 	if StatMgr.Device.openOLT.enableONUStats {
diff --git a/internal/pkg/olterrors/common.go b/internal/pkg/olterrors/common.go
index fa427a7..7a1d00d 100644
--- a/internal/pkg/olterrors/common.go
+++ b/internal/pkg/olterrors/common.go
@@ -18,7 +18,7 @@
 package olterrors
 
 import (
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 )
 
 var logger log.CLogger
diff --git a/internal/pkg/olterrors/olterrors.go b/internal/pkg/olterrors/olterrors.go
index c5790ac..43bcd07 100644
--- a/internal/pkg/olterrors/olterrors.go
+++ b/internal/pkg/olterrors/olterrors.go
@@ -21,7 +21,7 @@
 	"context"
 	"encoding/json"
 	"fmt"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 	"strings"
 )
 
@@ -364,4 +364,12 @@
 	// ErrResourceManagerInstantiating error returned when an unexpected
 	// condition occcurs while instantiating the resource manager
 	ErrResourceManagerInstantiating = NewErrAdapter("resoure-manager-instantiating", nil, nil)
+
+	// ErrFlowManagerInstantiating error returned when an unexpected
+	// condition occcurs while instantiating the flow manager
+	ErrFlowManagerInstantiating = NewErrAdapter("flow-manager-instantiating", nil, nil)
+
+	// ErrGroupManagerInstantiating error returned when an unexpected
+	// condition occcurs while instantiating the group manager
+	ErrGroupManagerInstantiating = NewErrAdapter("group-manager-instantiating", nil, nil)
 )
diff --git a/internal/pkg/resourcemanager/common.go b/internal/pkg/resourcemanager/common.go
index 5b6eedf..256e657 100644
--- a/internal/pkg/resourcemanager/common.go
+++ b/internal/pkg/resourcemanager/common.go
@@ -18,7 +18,7 @@
 package resourcemanager
 
 import (
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
 )
 
 var logger log.CLogger
diff --git a/internal/pkg/resourcemanager/resourcemanager.go b/internal/pkg/resourcemanager/resourcemanager.go
index a501310..737f694 100755
--- a/internal/pkg/resourcemanager/resourcemanager.go
+++ b/internal/pkg/resourcemanager/resourcemanager.go
@@ -22,17 +22,14 @@
 	"encoding/json"
 	"errors"
 	"fmt"
-	"strconv"
 	"strings"
 	"sync"
 	"time"
 
-	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
-
-	"github.com/opencord/voltha-lib-go/v4/pkg/db"
-	"github.com/opencord/voltha-lib-go/v4/pkg/db/kvstore"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
-	ponrmgr "github.com/opencord/voltha-lib-go/v4/pkg/ponresourcemanager"
+	"github.com/opencord/voltha-lib-go/v5/pkg/db"
+	"github.com/opencord/voltha-lib-go/v5/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
+	ponrmgr "github.com/opencord/voltha-lib-go/v5/pkg/ponresourcemanager"
 	ofp "github.com/opencord/voltha-protos/v4/go/openflow_13"
 	"github.com/opencord/voltha-protos/v4/go/openolt"
 )
@@ -42,20 +39,18 @@
 	KvstoreTimeout = 5 * time.Second
 	// BasePathKvStore - <pathPrefix>/openolt/<device_id>
 	BasePathKvStore = "%s/openolt/{%s}"
-	// TpIDPathSuffix - <(pon_id, onu_id, uni_id)>/tp_id
-	TpIDPathSuffix = "{%d,%d,%d}/tp_id"
+	// tpIDPathSuffix - <(pon_id, onu_id, uni_id)>/tp_id
+	tpIDPathSuffix = "{%d,%d,%d}/tp_id"
 	//MeterIDPathSuffix - <(pon_id, onu_id, uni_id)>/<tp_id>/meter_id/<direction>
 	MeterIDPathSuffix = "{%d,%d,%d}/{%d}/meter_id/{%s}"
-	//NnniIntfID - nniintfids
-	NnniIntfID = "nniintfids"
 	// OnuPacketINPathPrefix - path prefix where ONU packet-in vlanID/PCP is stored
 	//format: onu_packetin/{<intfid>,<onuid>,<logicalport>}
 	OnuPacketINPathPrefix = "onu_packetin/{%d,%d,%d}"
 	// OnuPacketINPath path on the kvstore to store packetin gemport,which will be used for packetin, packetout
 	//format: onu_packetin/{<intfid>,<onuid>,<logicalport>}/{<vlanId>,<priority>}
 	OnuPacketINPath = OnuPacketINPathPrefix + "/{%d,%d}"
-	//FlowIDsForGem flowids_per_gem/<intfid>
-	FlowIDsForGem = "flowids_per_gem/{%d}"
+	//FlowIDsForGem flowids_per_gem/<intfid>/<gemport-id>
+	FlowIDsForGem = "flowids_per_gem/{%d}/{%d}"
 	//McastQueuesForIntf multicast queues for pon interfaces
 	McastQueuesForIntf = "mcast_qs_for_int"
 	//FlowGroup flow_groups/<flow_group_id>
@@ -74,9 +69,10 @@
 	//FlowIDPath - Path on the KV store for storing list of Flow IDs for a given subscriber
 	//Format: BasePathKvStore/<(pon_intf_id, onu_id, uni_id)>/flow_ids
 	FlowIDPath = "{%s}/flow_ids"
-	//FlowIDInfoPath - Used to store more metadata associated with the flow_id
-	//Format: BasePathKvStore/<(pon_intf_id, onu_id, uni_id)>/flow_id_info/<flow_id>
-	FlowIDInfoPath = "{%s}/flow_id_info/{%d}"
+
+	//OnuGemInfoPath is path on the kvstore to store onugem info map
+	//format: <device-id>/onu_gem_info/<intfid>
+	OnuGemInfoPath = "onu_gem_info/{%d}/{%d}" // onu_gem/<intfid>/<onuID>
 )
 
 // FlowInfo holds the flow information
@@ -111,12 +107,13 @@
 
 // MeterInfo store meter information at path <(pon_id, onu_id, uni_id)>/<tp_id>/meter_id/<direction>
 type MeterInfo struct {
-	RefCnt      uint8 // number of flow references for this meter. When RefCnt is 0, the MeterInfo should be deleted.
-	MeterConfig ofp.OfpMeterConfig
+	RefCnt  uint8 // number of flow references for this meter. When RefCnt is 0, the MeterInfo should be deleted.
+	MeterID uint32
 }
 
 // OpenOltResourceMgr holds resource related information as provided below for each field
 type OpenOltResourceMgr struct {
+	PonIntfID  uint32
 	DeviceID   string      // OLT device id
 	Address    string      // Host and port of the kv store to connect to
 	Args       string      // args
@@ -124,14 +121,40 @@
 	DeviceType string
 	DevInfo    *openolt.DeviceInfo // device information
 	// array of pon resource managers per interface technology
-	ResourceMgrs map[uint32]*ponrmgr.PONResourceManager
+	PonRsrMgr *ponrmgr.PONResourceManager
 
-	// This protects concurrent gemport_id allocate/delete calls on a per PON port basis
-	GemPortIDMgmtLock []sync.RWMutex
-	// This protects concurrent alloc_id allocate/delete calls on a per PON port basis
-	AllocIDMgmtLock []sync.RWMutex
-	// This protects concurrent onu_id allocate/delete calls on a per PON port basis
-	OnuIDMgmtLock []sync.RWMutex
+	// Local maps used for write-through-cache - start
+	flowIDsForOnu     map[string][]uint64
+	flowIDsForOnuLock sync.RWMutex
+
+	allocIDsForOnu     map[string][]uint32
+	allocIDsForOnuLock sync.RWMutex
+
+	gemPortIDsForOnu     map[string][]uint32
+	gemPortIDsForOnuLock sync.RWMutex
+
+	techProfileIDsForOnu     map[string][]uint32
+	techProfileIDsForOnuLock sync.RWMutex
+
+	meterInfoForOnu     map[string]*MeterInfo
+	meterInfoForOnuLock sync.RWMutex
+
+	onuGemInfo     map[string]*OnuGemInfo
+	onuGemInfoLock sync.RWMutex
+
+	gemPortForPacketInInfo     map[string]uint32
+	gemPortForPacketInInfoLock sync.RWMutex
+
+	flowIDsForGem     map[uint32][]uint64
+	flowIDsForGemLock sync.RWMutex
+
+	mcastQueueForIntf                  map[uint32][]uint32
+	mcastQueueForIntfLock              sync.RWMutex
+	mcastQueueForIntfLoadedFromKvStore bool
+
+	groupInfo     map[string]*GroupInfo
+	groupInfoLock sync.RWMutex
+	// Local maps used for write-through-cache - end
 }
 
 func newKVClient(ctx context.Context, storeType string, address string, timeout time.Duration) (kvstore.Client, error) {
@@ -152,6 +175,7 @@
 		logger.Fatalw(ctx, "Failed to init KV client\n", log.Fields{"err": err})
 		return nil
 	}
+	// return db.NewBackend(ctx, backend, addr, KvstoreTimeout, fmt.Sprintf(BasePathKvStore, basePathKvStore, DeviceID))
 
 	kvbackend := &db.Backend{
 		Client:     kvClient,
@@ -166,346 +190,163 @@
 // NewResourceMgr init a New resource manager instance which in turn instantiates pon resource manager
 // instances according to technology. Initializes the default resource ranges for all
 // the resources.
-func NewResourceMgr(ctx context.Context, deviceID string, KVStoreAddress string, kvStoreType string, deviceType string, devInfo *openolt.DeviceInfo, basePathKvStore string) *OpenOltResourceMgr {
+func NewResourceMgr(ctx context.Context, PonIntfID uint32, deviceID string, KVStoreAddress string, kvStoreType string, deviceType string, devInfo *openolt.DeviceInfo, basePathKvStore string) *OpenOltResourceMgr {
 	var ResourceMgr OpenOltResourceMgr
-	logger.Debugf(ctx, "Init new resource manager , address: %s, device-id: %s", KVStoreAddress, deviceID)
+	logger.Debugf(ctx, "Init new resource manager , ponIf: %v, address: %s, device-id: %s", PonIntfID, KVStoreAddress, deviceID)
+	ResourceMgr.PonIntfID = PonIntfID
 	ResourceMgr.DeviceID = deviceID
 	ResourceMgr.Address = KVStoreAddress
 	ResourceMgr.DeviceType = deviceType
 	ResourceMgr.DevInfo = devInfo
-	NumPONPorts := devInfo.GetPonPorts()
 
 	Backend := kvStoreType
 	ResourceMgr.KVStore = SetKVClient(ctx, Backend, ResourceMgr.Address, deviceID, basePathKvStore)
 	if ResourceMgr.KVStore == nil {
 		logger.Error(ctx, "Failed to setup KV store")
 	}
-	Ranges := make(map[string]*openolt.DeviceInfo_DeviceResourceRanges)
-	RsrcMgrsByTech := make(map[string]*ponrmgr.PONResourceManager)
-	ResourceMgr.ResourceMgrs = make(map[uint32]*ponrmgr.PONResourceManager)
-
-	ResourceMgr.AllocIDMgmtLock = make([]sync.RWMutex, NumPONPorts)
-	ResourceMgr.GemPortIDMgmtLock = make([]sync.RWMutex, NumPONPorts)
-	ResourceMgr.OnuIDMgmtLock = make([]sync.RWMutex, NumPONPorts)
 
 	// TODO self.args = registry('main').get_args()
 
-	/*
-	   If a legacy driver returns protobuf without any ranges,s synthesize one from
-	   the legacy global per-device information. This, in theory, is temporary until
-	   the legacy drivers are upgrade to support pool ranges.
-	*/
-	if devInfo.Ranges == nil {
-		var ranges openolt.DeviceInfo_DeviceResourceRanges
-		ranges.Technology = devInfo.GetTechnology()
-
-		var index uint32
-		for index = 0; index < NumPONPorts; index++ {
-			ranges.IntfIds = append(ranges.IntfIds, index)
-		}
-
-		var Pool openolt.DeviceInfo_DeviceResourceRanges_Pool
-		Pool.Type = openolt.DeviceInfo_DeviceResourceRanges_Pool_ONU_ID
-		Pool.Start = devInfo.OnuIdStart
-		Pool.End = devInfo.OnuIdEnd
-		Pool.Sharing = openolt.DeviceInfo_DeviceResourceRanges_Pool_DEDICATED_PER_INTF
-		onuPool := Pool
-		ranges.Pools = append(ranges.Pools, &onuPool)
-
-		Pool.Type = openolt.DeviceInfo_DeviceResourceRanges_Pool_ALLOC_ID
-		Pool.Start = devInfo.AllocIdStart
-		Pool.End = devInfo.AllocIdEnd
-		Pool.Sharing = openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH
-		allocPool := Pool
-		ranges.Pools = append(ranges.Pools, &allocPool)
-
-		Pool.Type = openolt.DeviceInfo_DeviceResourceRanges_Pool_GEMPORT_ID
-		Pool.Start = devInfo.GemportIdStart
-		Pool.End = devInfo.GemportIdEnd
-		Pool.Sharing = openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH
-		gemPool := Pool
-		ranges.Pools = append(ranges.Pools, &gemPool)
-
-		Pool.Type = openolt.DeviceInfo_DeviceResourceRanges_Pool_FLOW_ID
-		Pool.Start = devInfo.FlowIdStart
-		Pool.End = devInfo.FlowIdEnd
-		Pool.Sharing = openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH
-		ranges.Pools = append(ranges.Pools, &Pool)
-		// Add to device info
-		devInfo.Ranges = append(devInfo.Ranges, &ranges)
-	}
-
 	// Create a separate Resource Manager instance for each range. This assumes that
 	// each technology is represented by only a single range
-	var GlobalPONRsrcMgr *ponrmgr.PONResourceManager
-	var err error
 	for _, TechRange := range devInfo.Ranges {
-		technology := TechRange.Technology
-		logger.Debugf(ctx, "Device info technology %s", technology)
-		Ranges[technology] = TechRange
+		for _, intfID := range TechRange.IntfIds {
+			if intfID == PonIntfID {
+				technology := TechRange.Technology
+				logger.Debugf(ctx, "Device info technology %s, intf-id %v", technology, PonIntfID)
 
-		RsrcMgrsByTech[technology], err = ponrmgr.NewPONResourceManager(ctx, technology, deviceType, deviceID,
-			Backend, ResourceMgr.Address, basePathKvStore)
-		if err != nil {
-			logger.Errorf(ctx, "Failed to create pon resource manager instance for technology %s", technology)
-			return nil
+				rsrMgr, err := ponrmgr.NewPONResourceManager(ctx, technology, deviceType, deviceID,
+					Backend, ResourceMgr.Address, basePathKvStore)
+				if err != nil {
+					logger.Errorf(ctx, "Failed to create pon resource manager instance for technology %s", technology)
+					return nil
+				}
+				ResourceMgr.PonRsrMgr = rsrMgr
+				// self.initialize_device_resource_range_and_pool(resource_mgr, global_resource_mgr, arange)
+				InitializeDeviceResourceRangeAndPool(ctx, rsrMgr, TechRange, devInfo)
+				if err := ResourceMgr.PonRsrMgr.InitDeviceResourcePoolForIntf(ctx, intfID); err != nil {
+					logger.Fatal(ctx, "failed-to-initialize-device-resource-pool-intf-id-%v-device-id", ResourceMgr.PonIntfID, ResourceMgr.DeviceID)
+					return nil
+				}
+			}
 		}
-		// resource_mgrs_by_tech[technology] = resource_mgr
-		if GlobalPONRsrcMgr == nil {
-			GlobalPONRsrcMgr = RsrcMgrsByTech[technology]
-		}
-		for _, IntfID := range TechRange.IntfIds {
-			ResourceMgr.ResourceMgrs[IntfID] = RsrcMgrsByTech[technology]
-		}
-		// self.initialize_device_resource_range_and_pool(resource_mgr, global_resource_mgr, arange)
-		InitializeDeviceResourceRangeAndPool(ctx, RsrcMgrsByTech[technology], GlobalPONRsrcMgr,
-			TechRange, devInfo)
 	}
-	// After we have initialized resource ranges, initialize the
-	// resource pools accordingly.
-	for _, PONRMgr := range RsrcMgrsByTech {
-		_ = PONRMgr.InitDeviceResourcePool(ctx)
-	}
+
+	ResourceMgr.InitLocalCache()
+
 	logger.Info(ctx, "Initialization of  resource manager success!")
 	return &ResourceMgr
 }
 
+//InitLocalCache initializes local maps used for write-through-cache
+func (rsrcMgr *OpenOltResourceMgr) InitLocalCache() {
+	rsrcMgr.flowIDsForOnu = make(map[string][]uint64)
+	rsrcMgr.allocIDsForOnu = make(map[string][]uint32)
+	rsrcMgr.gemPortIDsForOnu = make(map[string][]uint32)
+	rsrcMgr.techProfileIDsForOnu = make(map[string][]uint32)
+	rsrcMgr.meterInfoForOnu = make(map[string]*MeterInfo)
+	rsrcMgr.onuGemInfo = make(map[string]*OnuGemInfo)
+	rsrcMgr.gemPortForPacketInInfo = make(map[string]uint32)
+	rsrcMgr.flowIDsForGem = make(map[uint32][]uint64)
+	rsrcMgr.mcastQueueForIntf = make(map[uint32][]uint32)
+	rsrcMgr.groupInfo = make(map[string]*GroupInfo)
+}
+
 // InitializeDeviceResourceRangeAndPool initializes the resource range pool according to the sharing type, then apply
 // device specific information. If KV doesn't exist
 // or is broader than the device, the device's information will
 // dictate the range limits
-func InitializeDeviceResourceRangeAndPool(ctx context.Context, ponRMgr *ponrmgr.PONResourceManager, globalPONRMgr *ponrmgr.PONResourceManager,
+func InitializeDeviceResourceRangeAndPool(ctx context.Context, ponRMgr *ponrmgr.PONResourceManager,
 	techRange *openolt.DeviceInfo_DeviceResourceRanges, devInfo *openolt.DeviceInfo) {
+	// var ONUIDShared, AllocIDShared, GEMPortIDShared openolt.DeviceInfo_DeviceResourceRanges_Pool_SharingType
+	var ONUIDStart, ONUIDEnd, AllocIDStart, AllocIDEnd, GEMPortIDStart, GEMPortIDEnd uint32
+	var ONUIDShared, AllocIDShared, GEMPortIDShared, FlowIDShared uint32
+
+	// The below variables are just dummy and needed to pass as arguments to InitDefaultPONResourceRanges function.
+	// The openolt adapter does not need flowIDs to be managed as it is managed on the OLT device
+	// The UNI IDs are dynamically generated by openonu adapter for every discovered UNI.
+	var flowIDDummyStart, flowIDDummyEnd uint32 = 1, 2
+	var uniIDDummyStart, uniIDDummyEnd uint32 = 0, 1
 
 	// init the resource range pool according to the sharing type
-
-	logger.Debugf(ctx, "Resource range pool init for technology %s", ponRMgr.Technology)
-	// first load from KV profiles
-	status := ponRMgr.InitResourceRangesFromKVStore(ctx)
-	if !status {
-		logger.Debugf(ctx, "Failed to load resource ranges from KV store for tech %s", ponRMgr.Technology)
-	}
-
-	/*
-	   Then apply device specific information. If KV doesn't exist
-	   or is broader than the device, the device's information will
-	   dictate the range limits
-	*/
-	logger.Debugw(ctx, "Using device info to init pon resource ranges", log.Fields{"Tech": ponRMgr.Technology})
-
-	ONUIDStart := devInfo.OnuIdStart
-	ONUIDEnd := devInfo.OnuIdEnd
-	ONUIDShared := openolt.DeviceInfo_DeviceResourceRanges_Pool_DEDICATED_PER_INTF
-	ONUIDSharedPoolID := uint32(0)
-	AllocIDStart := devInfo.AllocIdStart
-	AllocIDEnd := devInfo.AllocIdEnd
-	AllocIDShared := openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH // TODO EdgeCore/BAL limitation
-	AllocIDSharedPoolID := uint32(0)
-	GEMPortIDStart := devInfo.GemportIdStart
-	GEMPortIDEnd := devInfo.GemportIdEnd
-	GEMPortIDShared := openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH // TODO EdgeCore/BAL limitation
-	GEMPortIDSharedPoolID := uint32(0)
-	FlowIDStart := devInfo.FlowIdStart
-	FlowIDEnd := devInfo.FlowIdEnd
-	FlowIDShared := openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH // TODO EdgeCore/BAL limitation
-	FlowIDSharedPoolID := uint32(0)
-
-	var FirstIntfPoolID uint32
-	var SharedPoolID uint32
-
-	/*
-	 * As a zero check is made against SharedPoolID to check whether the resources are shared across all intfs
-	 * if resources are shared across interfaces then SharedPoolID is given a positive number.
-	 */
-	for _, FirstIntfPoolID = range techRange.IntfIds {
-		// skip the intf id 0
-		if FirstIntfPoolID == 0 {
-			continue
-		}
-		break
-	}
-
+	logger.Debugw(ctx, "Device info init", log.Fields{"technology": techRange.Technology,
+		"onu_id_start": ONUIDStart, "onu_id_end": ONUIDEnd,
+		"alloc_id_start": AllocIDStart, "alloc_id_end": AllocIDEnd,
+		"gemport_id_start": GEMPortIDStart, "gemport_id_end": GEMPortIDEnd,
+		"intf_ids": techRange.IntfIds,
+	})
 	for _, RangePool := range techRange.Pools {
-		if RangePool.Sharing == openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH {
-			SharedPoolID = FirstIntfPoolID
-		} else if RangePool.Sharing == openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_SAME_TECH {
-			SharedPoolID = FirstIntfPoolID
-		} else {
-			SharedPoolID = 0
-		}
+		// FIXME: Remove hardcoding
 		if RangePool.Type == openolt.DeviceInfo_DeviceResourceRanges_Pool_ONU_ID {
 			ONUIDStart = RangePool.Start
 			ONUIDEnd = RangePool.End
-			ONUIDShared = RangePool.Sharing
-			ONUIDSharedPoolID = SharedPoolID
+			ONUIDShared = uint32(RangePool.Sharing)
 		} else if RangePool.Type == openolt.DeviceInfo_DeviceResourceRanges_Pool_ALLOC_ID {
 			AllocIDStart = RangePool.Start
 			AllocIDEnd = RangePool.End
-			AllocIDShared = RangePool.Sharing
-			AllocIDSharedPoolID = SharedPoolID
+			AllocIDShared = uint32(RangePool.Sharing)
 		} else if RangePool.Type == openolt.DeviceInfo_DeviceResourceRanges_Pool_GEMPORT_ID {
 			GEMPortIDStart = RangePool.Start
 			GEMPortIDEnd = RangePool.End
-			GEMPortIDShared = RangePool.Sharing
-			GEMPortIDSharedPoolID = SharedPoolID
-		} else if RangePool.Type == openolt.DeviceInfo_DeviceResourceRanges_Pool_FLOW_ID {
-			FlowIDStart = RangePool.Start
-			FlowIDEnd = RangePool.End
-			FlowIDShared = RangePool.Sharing
-			FlowIDSharedPoolID = SharedPoolID
+			GEMPortIDShared = uint32(RangePool.Sharing)
 		}
 	}
 
-	logger.Debugw(ctx, "Device info init", log.Fields{"technology": techRange.Technology,
-		"onu_id_start": ONUIDStart, "onu_id_end": ONUIDEnd, "onu_id_shared_pool_id": ONUIDSharedPoolID,
-		"alloc_id_start": AllocIDStart, "alloc_id_end": AllocIDEnd,
-		"alloc_id_shared_pool_id": AllocIDSharedPoolID,
-		"gemport_id_start":        GEMPortIDStart, "gemport_id_end": GEMPortIDEnd,
-		"gemport_id_shared_pool_id": GEMPortIDSharedPoolID,
-		"flow_id_start":             FlowIDStart,
-		"flow_id_end_idx":           FlowIDEnd,
-		"flow_id_shared_pool_id":    FlowIDSharedPoolID,
-		"intf_ids":                  techRange.IntfIds,
-		"uni_id_start":              0,
-		"uni_id_end_idx":            1, /*MaxUNIIDperONU()*/
-	})
-
-	ponRMgr.InitDefaultPONResourceRanges(ctx, ONUIDStart, ONUIDEnd, ONUIDSharedPoolID,
-		AllocIDStart, AllocIDEnd, AllocIDSharedPoolID,
-		GEMPortIDStart, GEMPortIDEnd, GEMPortIDSharedPoolID,
-		FlowIDStart, FlowIDEnd, FlowIDSharedPoolID, 0, 1,
+	ponRMgr.InitDefaultPONResourceRanges(ctx, ONUIDStart, ONUIDEnd, ONUIDShared,
+		AllocIDStart, AllocIDEnd, AllocIDShared,
+		GEMPortIDStart, GEMPortIDEnd, GEMPortIDShared,
+		flowIDDummyStart, flowIDDummyEnd, FlowIDShared, uniIDDummyStart, uniIDDummyEnd,
 		devInfo.PonPorts, techRange.IntfIds)
 
-	// For global sharing, make sure to refresh both local and global resource manager instances' range
-
-	if ONUIDShared == openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH {
-		globalPONRMgr.UpdateRanges(ctx, ponrmgr.ONU_ID_START_IDX, ONUIDStart, ponrmgr.ONU_ID_END_IDX, ONUIDEnd,
-			"", 0, nil)
-		ponRMgr.UpdateRanges(ctx, ponrmgr.ONU_ID_START_IDX, ONUIDStart, ponrmgr.ONU_ID_END_IDX, ONUIDEnd,
-			"", 0, globalPONRMgr)
-	}
-	if AllocIDShared == openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH {
-		globalPONRMgr.UpdateRanges(ctx, ponrmgr.ALLOC_ID_START_IDX, AllocIDStart, ponrmgr.ALLOC_ID_END_IDX, AllocIDEnd,
-			"", 0, nil)
-
-		ponRMgr.UpdateRanges(ctx, ponrmgr.ALLOC_ID_START_IDX, AllocIDStart, ponrmgr.ALLOC_ID_END_IDX, AllocIDEnd,
-			"", 0, globalPONRMgr)
-	}
-	if GEMPortIDShared == openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH {
-		globalPONRMgr.UpdateRanges(ctx, ponrmgr.GEMPORT_ID_START_IDX, GEMPortIDStart, ponrmgr.GEMPORT_ID_END_IDX, GEMPortIDEnd,
-			"", 0, nil)
-		ponRMgr.UpdateRanges(ctx, ponrmgr.GEMPORT_ID_START_IDX, GEMPortIDStart, ponrmgr.GEMPORT_ID_END_IDX, GEMPortIDEnd,
-			"", 0, globalPONRMgr)
-	}
-	if FlowIDShared == openolt.DeviceInfo_DeviceResourceRanges_Pool_SHARED_BY_ALL_INTF_ALL_TECH {
-		globalPONRMgr.UpdateRanges(ctx, ponrmgr.FLOW_ID_START_IDX, FlowIDStart, ponrmgr.FLOW_ID_END_IDX, FlowIDEnd,
-			"", 0, nil)
-		ponRMgr.UpdateRanges(ctx, ponrmgr.FLOW_ID_START_IDX, FlowIDStart, ponrmgr.FLOW_ID_END_IDX, FlowIDEnd,
-			"", 0, globalPONRMgr)
-	}
-
-	// Make sure loaded range fits the platform bit encoding ranges
-	ponRMgr.UpdateRanges(ctx, ponrmgr.UNI_ID_START_IDX, 0, ponrmgr.UNI_ID_END_IDX /* TODO =OpenOltPlatform.MAX_UNIS_PER_ONU-1*/, 1, "", 0, nil)
 }
 
 // Delete clears used resources for the particular olt device being deleted
-func (RsrcMgr *OpenOltResourceMgr) Delete(ctx context.Context) error {
-	/* TODO
-	   def __del__(self):
-	           self.log.info("clearing-device-resource-pool")
-	           for key, resource_mgr in self.resource_mgrs.iteritems():
-	               resource_mgr.clear_device_resource_pool()
-
-	       def assert_pon_id_limit(self, pon_intf_id):
-	           assert pon_intf_id in self.resource_mgrs
-
-	       def assert_onu_id_limit(self, pon_intf_id, onu_id):
-	           self.assert_pon_id_limit(pon_intf_id)
-	           self.resource_mgrs[pon_intf_id].assert_resource_limits(onu_id, PONResourceManager.ONU_ID)
-
-	       @property
-	       def max_uni_id_per_onu(self):
-	           return 0 #OpenOltPlatform.MAX_UNIS_PER_ONU-1, zero-based indexing Uncomment or override to make default multi-uni
-
-	       def assert_uni_id_limit(self, pon_intf_id, onu_id, uni_id):
-	           self.assert_onu_id_limit(pon_intf_id, onu_id)
-	           self.resource_mgrs[pon_intf_id].assert_resource_limits(uni_id, PONResourceManager.UNI_ID)
-	*/
-	for _, rsrcMgr := range RsrcMgr.ResourceMgrs {
-		if err := rsrcMgr.ClearDeviceResourcePool(ctx); err != nil {
-			logger.Debug(ctx, "Failed to clear device resource pool")
-			return err
-		}
+func (rsrcMgr *OpenOltResourceMgr) Delete(ctx context.Context, intfID uint32) error {
+	if err := rsrcMgr.PonRsrMgr.ClearDeviceResourcePoolForIntf(ctx, intfID); err != nil {
+		logger.Debug(ctx, "Failed to clear device resource pool")
+		return err
 	}
 	logger.Debug(ctx, "Cleared device resource pool")
 	return nil
 }
 
-// GetONUID returns the available OnuID for the given pon-port
-func (RsrcMgr *OpenOltResourceMgr) GetONUID(ctx context.Context, ponIntfID uint32) (uint32, error) {
-	// Check if Pon Interface ID is present in Resource-manager-map
-	RsrcMgr.OnuIDMgmtLock[ponIntfID].Lock()
-	defer RsrcMgr.OnuIDMgmtLock[ponIntfID].Unlock()
-
-	if _, ok := RsrcMgr.ResourceMgrs[ponIntfID]; !ok {
-		err := errors.New("invalid-pon-interface-" + strconv.Itoa(int(ponIntfID)))
-		return 0, err
-	}
+// GetONUID returns the available onuID for the given pon-port
+func (rsrcMgr *OpenOltResourceMgr) GetONUID(ctx context.Context, PonIntfID uint32) (uint32, error) {
 	// Get ONU id for a provided pon interface ID.
-	onuID, err := RsrcMgr.ResourceMgrs[ponIntfID].TechProfileMgr.GetResourceID(ctx, ponIntfID,
+	onuID, err := rsrcMgr.PonRsrMgr.TechProfileMgr.GetResourceID(ctx, PonIntfID,
 		ponrmgr.ONU_ID, 1)
 	if err != nil {
 		logger.Errorf(ctx, "Failed to get resource for interface %d for type %s",
-			ponIntfID, ponrmgr.ONU_ID)
+			PonIntfID, ponrmgr.ONU_ID)
 		return 0, err
 	}
-	if onuID != nil {
-		RsrcMgr.ResourceMgrs[ponIntfID].InitResourceMap(ctx, fmt.Sprintf("%d,%d", ponIntfID, onuID[0]))
+	if len(onuID) > 0 {
+		rsrcMgr.PonRsrMgr.InitResourceMap(ctx, fmt.Sprintf("%d,%d", PonIntfID, onuID[0]))
 		return onuID[0], err
 	}
 
-	return 0, err // return OnuID 0 on error
-}
-
-// GetFlowIDInfo returns the slice of flow info of the given pon-port
-// Note: For flows which trap from the NNI and not really associated with any particular
-// ONU (like LLDP), the onu_id and uni_id is set as -1. The intf_id is the NNI intf_id.
-func (RsrcMgr *OpenOltResourceMgr) GetFlowIDInfo(ctx context.Context, ponIntfID uint32, onuID int32, uniID int32, flowID uint64) *FlowInfo {
-	var flowInfo FlowInfo
-
-	subs := fmt.Sprintf("%d,%d,%d", ponIntfID, onuID, uniID)
-	Path := fmt.Sprintf(FlowIDInfoPath, subs, flowID)
-	value, err := RsrcMgr.KVStore.Get(ctx, Path)
-	if err == nil {
-		if value != nil {
-			Val, err := toByte(value.Value)
-			if err != nil {
-				logger.Errorw(ctx, "Failed to convert flowinfo into byte array", log.Fields{"error": err, "subs": subs})
-				return nil
-			}
-			if err = json.Unmarshal(Val, &flowInfo); err != nil {
-				logger.Errorw(ctx, "Failed to unmarshal", log.Fields{"error": err, "subs": subs})
-				return nil
-			}
-		}
-	}
-	if flowInfo.Flow == nil {
-		logger.Debugw(ctx, "No flowInfo found in KV store", log.Fields{"subs": subs})
-		return nil
-	}
-	return &flowInfo
+	return 0, err // return onuID 0 on error
 }
 
 // GetCurrentFlowIDsForOnu fetches flow ID from the resource manager
 // Note: For flows which trap from the NNI and not really associated with any particular
 // ONU (like LLDP), the onu_id and uni_id is set as -1. The intf_id is the NNI intf_id.
-func (RsrcMgr *OpenOltResourceMgr) GetCurrentFlowIDsForOnu(ctx context.Context, ponIntfID uint32, onuID int32, uniID int32) ([]uint64, error) {
+func (rsrcMgr *OpenOltResourceMgr) GetCurrentFlowIDsForOnu(ctx context.Context, PonIntfID uint32, onuID int32, uniID int32) ([]uint64, error) {
 
-	subs := fmt.Sprintf("%d,%d,%d", ponIntfID, onuID, uniID)
+	subs := fmt.Sprintf("%d,%d,%d", PonIntfID, onuID, uniID)
 	path := fmt.Sprintf(FlowIDPath, subs)
 
+	// fetch from cache
+	rsrcMgr.flowIDsForOnuLock.RLock()
+	flowIDsForOnu, ok := rsrcMgr.flowIDsForOnu[path]
+	rsrcMgr.flowIDsForOnuLock.RUnlock()
+
+	if ok {
+		return flowIDsForOnu, nil
+	}
+
 	var data []uint64
-	value, err := RsrcMgr.KVStore.Get(ctx, path)
+	value, err := rsrcMgr.KVStore.Get(ctx, path)
 	if err == nil {
 		if value != nil {
 			Val, _ := toByte(value.Value)
@@ -515,339 +356,126 @@
 			}
 		}
 	}
+	// update cache
+	rsrcMgr.flowIDsForOnuLock.Lock()
+	rsrcMgr.flowIDsForOnu[path] = data
+	rsrcMgr.flowIDsForOnuLock.Unlock()
+
 	return data, nil
 }
 
-// UpdateFlowIDInfo updates flow info for the given pon interface, onu id, and uni id
-// Note: For flows which trap from the NNI and not really associated with any particular
-// ONU (like LLDP), the onu_id and uni_id is set as -1. The intf_id is the NNI intf_id.
-func (RsrcMgr *OpenOltResourceMgr) UpdateFlowIDInfo(ctx context.Context, ponIntfID uint32, onuID int32, uniID int32,
-	flowID uint64, flowData FlowInfo) error {
-
-	subs := fmt.Sprintf("%d,%d,%d", ponIntfID, onuID, uniID)
-	path := fmt.Sprintf(FlowIDInfoPath, subs, flowID)
-
-	var value []byte
-	var err error
-	value, err = json.Marshal(flowData)
-	if err != nil {
-		logger.Errorf(ctx, "failed to Marshal, resource path %s", path)
-		return err
-	}
-
-	if err = RsrcMgr.KVStore.Put(ctx, path, value); err != nil {
-		logger.Errorf(ctx, "Failed to update resource %s", path)
-	}
-
-	// Update the flowID list for the ONU
-	if err = RsrcMgr.UpdateFlowIDForOnu(ctx, ponIntfID, onuID, uniID, flowID, true); err != nil {
-		// If the operation fails, try to remove FlowInfo from the KV store
-		_ = RsrcMgr.KVStore.Delete(ctx, path)
-		return err
-	}
-	return err
-}
-
-// UpdateFlowIDForOnu updates the flow_id list of the ONU (add or remove flow_id from the list)
-func (RsrcMgr *OpenOltResourceMgr) UpdateFlowIDForOnu(ctx context.Context, ponIntfID uint32, onuID int32, uniID int32, flowID uint64, add bool) error {
-	/*
-	   Update the flow_id list of the ONU (add or remove flow_id from the list)
-	   :param pon_intf_onu_id: reference of PON interface id and onu id
-	   :param flow_id: flow ID
-	   :param add: Boolean flag to indicate whether the flow_id should be
-	               added or removed from the list. Defaults to adding the flow.
-	*/
-	var Value []byte
-	var err error
-	var retVal bool
-	var idx uint64
-	subs := fmt.Sprintf("%d,%d,%d", ponIntfID, onuID, uniID)
-	path := fmt.Sprintf(FlowIDPath, subs)
-	flowIDs, err := RsrcMgr.GetCurrentFlowIDsForOnu(ctx, ponIntfID, onuID, uniID)
-	if err != nil {
-		// Error logged in the called function
-		return err
-	}
-
-	if add {
-		if retVal, _ = checkForFlowIDInList(flowIDs, flowID); retVal {
-			return nil
-		}
-		flowIDs = append(flowIDs, flowID)
-	} else {
-		if retVal, idx = checkForFlowIDInList(flowIDs, flowID); !retVal {
-			return nil
-		}
-		// delete the index and shift
-		flowIDs = append(flowIDs[:idx], flowIDs[idx+1:]...)
-	}
-	Value, err = json.Marshal(flowIDs)
-	if err != nil {
-		logger.Error(ctx, "Failed to Marshal")
-		return err
-	}
-
-	if err = RsrcMgr.KVStore.Put(ctx, path, Value); err != nil {
-		logger.Errorf(ctx, "Failed to update resource %s", path)
-		return err
-	}
-	return err
-}
-
-// RemoveFlowIDInfo remove flow info for the given pon interface, onu id, and uni id
-// Note: For flows which trap from the NNI and not really associated with any particular
-// ONU (like LLDP), the onu_id and uni_id is set as -1. The intf_id is the NNI intf_id.
-func (RsrcMgr *OpenOltResourceMgr) RemoveFlowIDInfo(ctx context.Context, ponIntfID uint32, onuID int32, uniID int32,
-	flowID uint64) error {
-
-	subs := fmt.Sprintf("%d,%d,%d", ponIntfID, onuID, uniID)
-	path := fmt.Sprintf(FlowIDInfoPath, subs, flowID)
-
-	var err error
-	if err = RsrcMgr.KVStore.Delete(ctx, path); err != nil {
-		logger.Errorf(ctx, "Failed to delete resource %s", path)
-		return err
-	}
-
-	// Update the flowID list for the ONU
-	err = RsrcMgr.UpdateFlowIDForOnu(ctx, ponIntfID, onuID, uniID, flowID, false)
-
-	return err
-}
-
-// RemoveAllFlowsForIntfOnuUniKey removes flow info for the given interface, onu id, and uni id
-func (RsrcMgr *OpenOltResourceMgr) RemoveAllFlowsForIntfOnuUniKey(ctx context.Context, intf uint32, onuID int32, uniID int32) error {
-	flowIDs, err := RsrcMgr.GetCurrentFlowIDsForOnu(ctx, intf, onuID, uniID)
-	if err != nil {
-		// error logged in the called function
-		return err
-	}
-	for _, flID := range flowIDs {
-		if err := RsrcMgr.RemoveFlowIDInfo(ctx, intf, onuID, uniID, flID); err != nil {
-			logger.Errorw(ctx, "failed-to-delete-flow-id-info", log.Fields{"intf": intf, "onuID": onuID, "uniID": uniID, "flowID": flID})
-		}
-	}
-	subs := fmt.Sprintf("%d,%d,%d", intf, onuID, uniID)
-	path := fmt.Sprintf(FlowIDPath, subs)
-	if err := RsrcMgr.KVStore.Delete(ctx, path); err != nil {
-		logger.Errorf(ctx, "Failed to delete resource %s", path)
-		return err
-	}
-	return nil
-}
-
-// GetAllocID return the first Alloc ID for a given pon interface id and onu id and then update the resource map on
-// the KV store with the list of alloc_ids allocated for the pon_intf_onu_id tuple
-// Currently of all the alloc_ids available, it returns the first alloc_id in the list for tha given ONU
-func (RsrcMgr *OpenOltResourceMgr) GetAllocID(ctx context.Context, intfID uint32, onuID uint32, uniID uint32) uint32 {
-
-	var err error
-	IntfOnuIDUniID := fmt.Sprintf("%d,%d,%d", intfID, onuID, uniID)
-
-	RsrcMgr.AllocIDMgmtLock[intfID].Lock()
-	defer RsrcMgr.AllocIDMgmtLock[intfID].Unlock()
-
-	AllocID := RsrcMgr.ResourceMgrs[intfID].GetCurrentAllocIDForOnu(ctx, IntfOnuIDUniID)
-	if AllocID != nil {
-		// Since we support only one alloc_id for the ONU at the moment,
-		// return the first alloc_id in the list, if available, for that
-		// ONU.
-		logger.Debugw(ctx, "Retrieved alloc ID from pon resource mgr", log.Fields{"AllocID": AllocID})
-		return AllocID[0]
-	}
-	AllocID, err = RsrcMgr.ResourceMgrs[intfID].GetResourceID(ctx, intfID,
-		ponrmgr.ALLOC_ID, 1)
-
-	if AllocID == nil || err != nil {
-		logger.Error(ctx, "Failed to allocate alloc id")
-		return 0
-	}
-	// update the resource map on KV store with the list of alloc_id
-	// allocated for the pon_intf_onu_id tuple
-	err = RsrcMgr.ResourceMgrs[intfID].UpdateAllocIdsForOnu(ctx, IntfOnuIDUniID, AllocID)
-	if err != nil {
-		logger.Error(ctx, "Failed to update Alloc ID")
-		return 0
-	}
-	logger.Debugw(ctx, "Allocated new Tcont from pon resource mgr", log.Fields{"AllocID": AllocID})
-	return AllocID[0]
-}
-
 // UpdateAllocIdsForOnu updates alloc ids in kv store for a given pon interface id, onu id and uni id
-func (RsrcMgr *OpenOltResourceMgr) UpdateAllocIdsForOnu(ctx context.Context, ponPort uint32, onuID uint32, uniID uint32, allocID []uint32) error {
+func (rsrcMgr *OpenOltResourceMgr) UpdateAllocIdsForOnu(ctx context.Context, ponPort uint32, onuID uint32, uniID uint32, allocIDs []uint32) error {
 
-	IntfOnuIDUniID := fmt.Sprintf("%d,%d,%d", ponPort, onuID, uniID)
-	return RsrcMgr.ResourceMgrs[ponPort].UpdateAllocIdsForOnu(ctx, IntfOnuIDUniID,
-		allocID)
+	intfOnuIDuniID := fmt.Sprintf("%d,%d,%d", ponPort, onuID, uniID)
+	// update cache
+	rsrcMgr.allocIDsForOnuLock.Lock()
+	rsrcMgr.allocIDsForOnu[intfOnuIDuniID] = allocIDs
+	rsrcMgr.allocIDsForOnuLock.Unlock()
+
+	// Note: in case the write to DB fails there could be inconsistent data between cache and db.
+	// Although this is highly unlikely with DB retries in place, this is something we have to deal with in the next release
+	return rsrcMgr.PonRsrMgr.UpdateAllocIdsForOnu(ctx, intfOnuIDuniID,
+		allocIDs)
 }
 
 // GetCurrentGEMPortIDsForOnu returns gem ports for given pon interface , onu id and uni id
-func (RsrcMgr *OpenOltResourceMgr) GetCurrentGEMPortIDsForOnu(ctx context.Context, intfID uint32, onuID uint32,
+func (rsrcMgr *OpenOltResourceMgr) GetCurrentGEMPortIDsForOnu(ctx context.Context, intfID uint32, onuID uint32,
 	uniID uint32) []uint32 {
 
-	/* Get gem ports for given pon interface , onu id and uni id. */
+	intfOnuIDuniID := fmt.Sprintf("%d,%d,%d", intfID, onuID, uniID)
 
-	IntfOnuIDUniID := fmt.Sprintf("%d,%d,%d", intfID, onuID, uniID)
-	return RsrcMgr.ResourceMgrs[intfID].GetCurrentGEMPortIDsForOnu(ctx, IntfOnuIDUniID)
+	// fetch from cache
+	rsrcMgr.gemPortIDsForOnuLock.RLock()
+	gemIDs, ok := rsrcMgr.gemPortIDsForOnu[intfOnuIDuniID]
+	rsrcMgr.gemPortIDsForOnuLock.RUnlock()
+	if ok {
+		return gemIDs
+	}
+	/* Get gem ports for given pon interface , onu id and uni id. */
+	gemIDs = rsrcMgr.PonRsrMgr.GetCurrentGEMPortIDsForOnu(ctx, intfOnuIDuniID)
+
+	// update cache
+	rsrcMgr.gemPortIDsForOnuLock.Lock()
+	rsrcMgr.gemPortIDsForOnu[intfOnuIDuniID] = gemIDs
+	rsrcMgr.gemPortIDsForOnuLock.Unlock()
+
+	return gemIDs
 }
 
 // GetCurrentAllocIDsForOnu returns alloc ids for given pon interface and onu id
-func (RsrcMgr *OpenOltResourceMgr) GetCurrentAllocIDsForOnu(ctx context.Context, intfID uint32, onuID uint32, uniID uint32) []uint32 {
+func (rsrcMgr *OpenOltResourceMgr) GetCurrentAllocIDsForOnu(ctx context.Context, intfID uint32, onuID uint32, uniID uint32) []uint32 {
 
-	IntfOnuIDUniID := fmt.Sprintf("%d,%d,%d", intfID, onuID, uniID)
-	AllocID := RsrcMgr.ResourceMgrs[intfID].GetCurrentAllocIDForOnu(ctx, IntfOnuIDUniID)
-	if AllocID != nil {
-		return AllocID
+	intfOnuIDuniID := fmt.Sprintf("%d,%d,%d", intfID, onuID, uniID)
+	// fetch from cache
+	rsrcMgr.allocIDsForOnuLock.RLock()
+	allocIDs, ok := rsrcMgr.allocIDsForOnu[intfOnuIDuniID]
+	rsrcMgr.allocIDsForOnuLock.RUnlock()
+	if ok {
+		return allocIDs
 	}
-	return []uint32{}
+	allocIDs = rsrcMgr.PonRsrMgr.GetCurrentAllocIDForOnu(ctx, intfOnuIDuniID)
+
+	// update cache
+	rsrcMgr.allocIDsForOnuLock.Lock()
+	rsrcMgr.allocIDsForOnu[intfOnuIDuniID] = allocIDs
+	rsrcMgr.allocIDsForOnuLock.Unlock()
+
+	return allocIDs
 }
 
 // RemoveAllocIDForOnu removes the alloc id for given pon interface, onu id, uni id and alloc id
-func (RsrcMgr *OpenOltResourceMgr) RemoveAllocIDForOnu(ctx context.Context, intfID uint32, onuID uint32, uniID uint32, allocID uint32) {
-	allocIDs := RsrcMgr.GetCurrentAllocIDsForOnu(ctx, intfID, onuID, uniID)
+func (rsrcMgr *OpenOltResourceMgr) RemoveAllocIDForOnu(ctx context.Context, intfID uint32, onuID uint32, uniID uint32, allocID uint32) {
+	allocIDs := rsrcMgr.GetCurrentAllocIDsForOnu(ctx, intfID, onuID, uniID)
 	for i := 0; i < len(allocIDs); i++ {
 		if allocIDs[i] == allocID {
 			allocIDs = append(allocIDs[:i], allocIDs[i+1:]...)
 			break
 		}
 	}
-	err := RsrcMgr.UpdateAllocIdsForOnu(ctx, intfID, onuID, uniID, allocIDs)
+	err := rsrcMgr.UpdateAllocIdsForOnu(ctx, intfID, onuID, uniID, allocIDs)
 	if err != nil {
-		logger.Errorf(ctx, "Failed to Remove Alloc Id For Onu. IntfID %d onuID %d uniID %d allocID %d",
+		logger.Errorf(ctx, "Failed to Remove Alloc Id For Onu. intfID %d onuID %d uniID %d allocID %d",
 			intfID, onuID, uniID, allocID)
 	}
 }
 
 // RemoveGemPortIDForOnu removes the gem port id for given pon interface, onu id, uni id and gem port id
-func (RsrcMgr *OpenOltResourceMgr) RemoveGemPortIDForOnu(ctx context.Context, intfID uint32, onuID uint32, uniID uint32, gemPortID uint32) {
-	gemPortIDs := RsrcMgr.GetCurrentGEMPortIDsForOnu(ctx, intfID, onuID, uniID)
+func (rsrcMgr *OpenOltResourceMgr) RemoveGemPortIDForOnu(ctx context.Context, intfID uint32, onuID uint32, uniID uint32, gemPortID uint32) {
+	gemPortIDs := rsrcMgr.GetCurrentGEMPortIDsForOnu(ctx, intfID, onuID, uniID)
 	for i := 0; i < len(gemPortIDs); i++ {
 		if gemPortIDs[i] == gemPortID {
 			gemPortIDs = append(gemPortIDs[:i], gemPortIDs[i+1:]...)
 			break
 		}
 	}
-	err := RsrcMgr.UpdateGEMPortIDsForOnu(ctx, intfID, onuID, uniID, gemPortIDs)
+	err := rsrcMgr.UpdateGEMPortIDsForOnu(ctx, intfID, onuID, uniID, gemPortIDs)
 	if err != nil {
-		logger.Errorf(ctx, "Failed to Remove Gem Id For Onu. IntfID %d onuID %d uniID %d gemPortId %d",
+		logger.Errorf(ctx, "Failed to Remove Gem Id For Onu. intfID %d onuID %d uniID %d gemPortId %d",
 			intfID, onuID, uniID, gemPortID)
 	}
 }
 
-//GetUniPortByPonPortGemPortFromKVStore retrieves onu and uni ID associated with the pon and gem ports.
-func (RsrcMgr *OpenOltResourceMgr) GetUniPortByPonPortGemPortFromKVStore(ctx context.Context, PonPort uint32, GemPort uint32) (uint32, uint32, error) {
-	IntfGEMPortPath := fmt.Sprintf("%d,%d", PonPort, GemPort)
-	logger.Debugf(ctx, "Getting ONU and UNI IDs from the path %s", IntfGEMPortPath)
-	var Data []uint32
-	Value, err := RsrcMgr.KVStore.Get(ctx, IntfGEMPortPath)
-	if err == nil {
-		if Value != nil {
-			Val, _ := ponrmgr.ToByte(Value.Value)
-			if err = json.Unmarshal(Val, &Data); err != nil {
-				logger.Errorw(ctx, "Failed to unmarshal", log.Fields{"error": err})
-				return 0, 0, errors.New("failed to unmarshal the data retrieved")
-			}
-		}
-	} else {
-		logger.Errorf(ctx, "Failed to get data from kvstore for %s", IntfGEMPortPath, err)
-		return 0, 0, errors.New("could not get data")
-	}
-	if len(Data) < 2 {
-		return 0, 0, errors.New("invalid data format")
-	}
-	return Data[0], Data[1], nil
-}
-
-// UpdateGEMportsPonportToOnuMapOnKVStore updates onu and uni id associated with the gem port to the kv store
-// This stored information is used when packet_indication is received and we need to derive the ONU Id for which
-// the packet arrived based on the pon_intf and gemport available in the packet_indication
-func (RsrcMgr *OpenOltResourceMgr) UpdateGEMportsPonportToOnuMapOnKVStore(ctx context.Context, gemPorts []uint32, PonPort uint32,
-	onuID uint32, uniID uint32) error {
-
-	/* Update onu and uni id associated with the gem port to the kv store. */
-	var IntfGEMPortPath string
-	Data := []uint32{onuID, uniID}
-	for _, GEM := range gemPorts {
-		IntfGEMPortPath = fmt.Sprintf("%d,%d", PonPort, GEM)
-		Val, err := json.Marshal(Data)
-		if err != nil {
-			logger.Error(ctx, "failed to Marshal")
-			return err
-		}
-
-		if err = RsrcMgr.KVStore.Put(ctx, IntfGEMPortPath, Val); err != nil {
-			logger.Errorf(ctx, "Failed to update resource %s", IntfGEMPortPath)
-			return err
-		}
-	}
-	return nil
-}
-
-// RemoveGEMportPonportToOnuMapOnKVStore removes the relationship between the gem port and pon port
-func (RsrcMgr *OpenOltResourceMgr) RemoveGEMportPonportToOnuMapOnKVStore(ctx context.Context, GemPort uint32, PonPort uint32) {
-	IntfGEMPortPath := fmt.Sprintf("%d,%d", PonPort, GemPort)
-	err := RsrcMgr.KVStore.Delete(ctx, IntfGEMPortPath)
-	if err != nil {
-		logger.Errorf(ctx, "Failed to Remove Gem port-Pon port to onu map on kv store. Gem %d PonPort %d", GemPort, PonPort)
-	}
-}
-
-// GetGEMPortID gets gem port id for a particular pon port, onu id and uni id and then update the resource map on
-// the KV store with the list of gemport_id allocated for the pon_intf_onu_id tuple
-func (RsrcMgr *OpenOltResourceMgr) GetGEMPortID(ctx context.Context, ponPort uint32, onuID uint32,
-	uniID uint32, NumOfPorts uint32) ([]uint32, error) {
-
-	/* Get gem port id for a particular pon port, onu id
-	   and uni id.
-	*/
-
-	var err error
-	IntfOnuIDUniID := fmt.Sprintf("%d,%d,%d", ponPort, onuID, uniID)
-
-	RsrcMgr.GemPortIDMgmtLock[ponPort].Lock()
-	defer RsrcMgr.GemPortIDMgmtLock[ponPort].Unlock()
-
-	GEMPortList := RsrcMgr.ResourceMgrs[ponPort].GetCurrentGEMPortIDsForOnu(ctx, IntfOnuIDUniID)
-	if GEMPortList != nil {
-		return GEMPortList, nil
-	}
-
-	GEMPortList, err = RsrcMgr.ResourceMgrs[ponPort].GetResourceID(ctx, ponPort,
-		ponrmgr.GEMPORT_ID, NumOfPorts)
-	if err != nil && GEMPortList == nil {
-		logger.Errorf(ctx, "Failed to get gem port id for %s", IntfOnuIDUniID)
-		return nil, err
-	}
-
-	// update the resource map on KV store with the list of gemport_id
-	// allocated for the pon_intf_onu_id tuple
-	err = RsrcMgr.ResourceMgrs[ponPort].UpdateGEMPortIDsForOnu(ctx, IntfOnuIDUniID,
-		GEMPortList)
-	if err != nil {
-		logger.Errorf(ctx, "Failed to update GEM ports to kv store for %s", IntfOnuIDUniID)
-		return nil, err
-	}
-	_ = RsrcMgr.UpdateGEMportsPonportToOnuMapOnKVStore(ctx, GEMPortList, ponPort,
-		onuID, uniID)
-	return GEMPortList, err
-}
-
 // UpdateGEMPortIDsForOnu updates gemport ids on to the kv store for a given pon port, onu id and uni id
-func (RsrcMgr *OpenOltResourceMgr) UpdateGEMPortIDsForOnu(ctx context.Context, ponPort uint32, onuID uint32,
-	uniID uint32, GEMPortList []uint32) error {
-	IntfOnuIDUniID := fmt.Sprintf("%d,%d,%d", ponPort, onuID, uniID)
-	return RsrcMgr.ResourceMgrs[ponPort].UpdateGEMPortIDsForOnu(ctx, IntfOnuIDUniID,
-		GEMPortList)
+func (rsrcMgr *OpenOltResourceMgr) UpdateGEMPortIDsForOnu(ctx context.Context, ponPort uint32, onuID uint32,
+	uniID uint32, gemIDs []uint32) error {
+	intfOnuIDuniID := fmt.Sprintf("%d,%d,%d", ponPort, onuID, uniID)
+	// update cache
+	rsrcMgr.gemPortIDsForOnuLock.Lock()
+	rsrcMgr.gemPortIDsForOnu[intfOnuIDuniID] = gemIDs
+	rsrcMgr.gemPortIDsForOnuLock.Unlock()
+
+	// Note: in case the write to DB fails there could be inconsistent data between cache and db.
+	// Although this is highly unlikely with DB retries in place, this is something we have to deal with in the next release
+	return rsrcMgr.PonRsrMgr.UpdateGEMPortIDsForOnu(ctx, intfOnuIDuniID,
+		gemIDs)
 
 }
 
 // FreeonuID releases(make free) onu id for a particular pon-port
-func (RsrcMgr *OpenOltResourceMgr) FreeonuID(ctx context.Context, intfID uint32, onuID []uint32) {
+func (rsrcMgr *OpenOltResourceMgr) FreeonuID(ctx context.Context, intfID uint32, onuID []uint32) {
 
-	RsrcMgr.OnuIDMgmtLock[intfID].Lock()
-	defer RsrcMgr.OnuIDMgmtLock[intfID].Unlock()
-
-	if err := RsrcMgr.ResourceMgrs[intfID].TechProfileMgr.FreeResourceID(ctx, intfID, ponrmgr.ONU_ID, onuID); err != nil {
+	if err := rsrcMgr.PonRsrMgr.TechProfileMgr.FreeResourceID(ctx, intfID, ponrmgr.ONU_ID, onuID); err != nil {
 		logger.Errorw(ctx, "error-while-freeing-onu-id", log.Fields{
 			"intf-id": intfID,
 			"onu-id":  onuID,
@@ -859,23 +487,23 @@
 	var IntfonuID string
 	for _, onu := range onuID {
 		IntfonuID = fmt.Sprintf("%d,%d", intfID, onu)
-		RsrcMgr.ResourceMgrs[intfID].RemoveResourceMap(ctx, IntfonuID)
+		rsrcMgr.PonRsrMgr.RemoveResourceMap(ctx, IntfonuID)
 	}
 }
 
 // FreeAllocID frees AllocID on the PON resource pool and also frees the allocID association
 // for the given OLT device.
-func (RsrcMgr *OpenOltResourceMgr) FreeAllocID(ctx context.Context, IntfID uint32, onuID uint32,
+// The caller should ensure that this is a blocking call and this operation is serialized for
+// the ONU so as not cause resource corruption since there are no mutexes used here.
+func (rsrcMgr *OpenOltResourceMgr) FreeAllocID(ctx context.Context, intfID uint32, onuID uint32,
 	uniID uint32, allocID uint32) {
-	RsrcMgr.AllocIDMgmtLock[IntfID].Lock()
-	defer RsrcMgr.AllocIDMgmtLock[IntfID].Unlock()
 
-	RsrcMgr.RemoveAllocIDForOnu(ctx, IntfID, onuID, uniID, allocID)
+	rsrcMgr.RemoveAllocIDForOnu(ctx, intfID, onuID, uniID, allocID)
 	allocIDs := make([]uint32, 0)
 	allocIDs = append(allocIDs, allocID)
-	if err := RsrcMgr.ResourceMgrs[IntfID].TechProfileMgr.FreeResourceID(ctx, IntfID, ponrmgr.ALLOC_ID, allocIDs); err != nil {
+	if err := rsrcMgr.PonRsrMgr.TechProfileMgr.FreeResourceID(ctx, intfID, ponrmgr.ALLOC_ID, allocIDs); err != nil {
 		logger.Errorw(ctx, "error-while-freeing-alloc-id", log.Fields{
-			"intf-id": IntfID,
+			"intf-id": intfID,
 			"onu-id":  onuID,
 			"err":     err.Error(),
 		})
@@ -884,33 +512,35 @@
 
 // FreeGemPortID frees GemPortID on the PON resource pool and also frees the gemPortID association
 // for the given OLT device.
-func (RsrcMgr *OpenOltResourceMgr) FreeGemPortID(ctx context.Context, IntfID uint32, onuID uint32,
+// The caller should ensure that this is a blocking call and this operation is serialized for
+// the ONU so as not cause resource corruption since there are no mutexes used here.
+func (rsrcMgr *OpenOltResourceMgr) FreeGemPortID(ctx context.Context, intfID uint32, onuID uint32,
 	uniID uint32, gemPortID uint32) {
-	RsrcMgr.GemPortIDMgmtLock[IntfID].Lock()
-	defer RsrcMgr.GemPortIDMgmtLock[IntfID].Unlock()
+	rsrcMgr.RemoveGemPortIDForOnu(ctx, intfID, onuID, uniID, gemPortID)
 
-	RsrcMgr.RemoveGemPortIDForOnu(ctx, IntfID, onuID, uniID, gemPortID)
 	gemPortIDs := make([]uint32, 0)
 	gemPortIDs = append(gemPortIDs, gemPortID)
-	if err := RsrcMgr.ResourceMgrs[IntfID].TechProfileMgr.FreeResourceID(ctx, IntfID, ponrmgr.GEMPORT_ID, gemPortIDs); err != nil {
+	if err := rsrcMgr.PonRsrMgr.TechProfileMgr.FreeResourceID(ctx, intfID, ponrmgr.GEMPORT_ID, gemPortIDs); err != nil {
 		logger.Errorw(ctx, "error-while-freeing-gem-port-id", log.Fields{
-			"intf-id": IntfID,
+			"intf-id": intfID,
 			"onu-id":  onuID,
 			"err":     err.Error(),
 		})
 	}
 }
 
-// FreePONResourcesForONU make the pon resources free for a given pon interface and onu id, and the clears the
-// resource map and the onuID associated with (pon_intf_id, gemport_id) tuple,
-func (RsrcMgr *OpenOltResourceMgr) FreePONResourcesForONU(ctx context.Context, intfID uint32, onuID uint32, uniID uint32) {
+// FreePONResourcesForONU make the pon resources free for a given pon interface and onu id
+func (rsrcMgr *OpenOltResourceMgr) FreePONResourcesForONU(ctx context.Context, intfID uint32, onuID uint32, uniID uint32) {
 
-	IntfOnuIDUniID := fmt.Sprintf("%d,%d,%d", intfID, onuID, uniID)
+	intfOnuIDuniID := fmt.Sprintf("%d,%d,%d", intfID, onuID, uniID)
 
-	RsrcMgr.AllocIDMgmtLock[intfID].Lock()
-	AllocIDs := RsrcMgr.ResourceMgrs[intfID].GetCurrentAllocIDForOnu(ctx, IntfOnuIDUniID)
+	AllocIDs := rsrcMgr.PonRsrMgr.GetCurrentAllocIDForOnu(ctx, intfOnuIDuniID)
 
-	if err := RsrcMgr.ResourceMgrs[intfID].TechProfileMgr.FreeResourceID(ctx, intfID,
+	rsrcMgr.allocIDsForOnuLock.Lock()
+	delete(rsrcMgr.allocIDsForOnu, intfOnuIDuniID)
+	rsrcMgr.allocIDsForOnuLock.Unlock()
+
+	if err := rsrcMgr.PonRsrMgr.TechProfileMgr.FreeResourceID(ctx, intfID,
 		ponrmgr.ALLOC_ID,
 		AllocIDs); err != nil {
 		logger.Errorw(ctx, "error-while-freeing-all-alloc-ids-for-onu", log.Fields{
@@ -919,11 +549,14 @@
 			"err":     err.Error(),
 		})
 	}
-	RsrcMgr.AllocIDMgmtLock[intfID].Unlock()
 
-	RsrcMgr.GemPortIDMgmtLock[intfID].Lock()
-	GEMPortIDs := RsrcMgr.ResourceMgrs[intfID].GetCurrentGEMPortIDsForOnu(ctx, IntfOnuIDUniID)
-	if err := RsrcMgr.ResourceMgrs[intfID].TechProfileMgr.FreeResourceID(ctx, intfID,
+	GEMPortIDs := rsrcMgr.PonRsrMgr.GetCurrentGEMPortIDsForOnu(ctx, intfOnuIDuniID)
+
+	rsrcMgr.gemPortIDsForOnuLock.Lock()
+	delete(rsrcMgr.gemPortIDsForOnu, intfOnuIDuniID)
+	rsrcMgr.gemPortIDsForOnuLock.Unlock()
+
+	if err := rsrcMgr.PonRsrMgr.TechProfileMgr.FreeResourceID(ctx, intfID,
 		ponrmgr.GEMPORT_ID,
 		GEMPortIDs); err != nil {
 		logger.Errorw(ctx, "error-while-freeing-all-gem-port-ids-for-onu", log.Fields{
@@ -932,28 +565,23 @@
 			"err":     err.Error(),
 		})
 	}
-	RsrcMgr.GemPortIDMgmtLock[intfID].Unlock()
 
 	// Clear resource map associated with (pon_intf_id, gemport_id) tuple.
-	RsrcMgr.ResourceMgrs[intfID].RemoveResourceMap(ctx, IntfOnuIDUniID)
-	// Clear the ONU Id associated with the (pon_intf_id, gemport_id) tuple.
-	for _, GEM := range GEMPortIDs {
-		_ = RsrcMgr.KVStore.Delete(ctx, fmt.Sprintf("%d,%d", intfID, GEM))
-	}
+	rsrcMgr.PonRsrMgr.RemoveResourceMap(ctx, intfOnuIDuniID)
 }
 
 // IsFlowOnKvStore checks if the given flowID is present on the kv store
 // Returns true if the flowID is found, otherwise it returns false
-func (RsrcMgr *OpenOltResourceMgr) IsFlowOnKvStore(ctx context.Context, ponIntfID uint32, onuID int32, uniID int32,
+func (rsrcMgr *OpenOltResourceMgr) IsFlowOnKvStore(ctx context.Context, intfID uint32, onuID int32, uniID int32,
 	flowID uint64) bool {
 
-	FlowIDs, err := RsrcMgr.GetCurrentFlowIDsForOnu(ctx, ponIntfID, onuID, uniID)
+	FlowIDs, err := rsrcMgr.GetCurrentFlowIDsForOnu(ctx, intfID, onuID, uniID)
 	if err != nil {
 		// error logged in the called function
 		return false
 	}
 	if FlowIDs != nil {
-		logger.Debugw(ctx, "Found flowId(s) for this ONU", log.Fields{"pon": ponIntfID, "onuID": onuID, "uniID": uniID})
+		logger.Debugw(ctx, "Found flowId(s) for this ONU", log.Fields{"pon": intfID, "onuID": onuID, "uniID": uniID})
 		for _, id := range FlowIDs {
 			if flowID == id {
 				return true
@@ -964,89 +592,117 @@
 }
 
 // GetTechProfileIDForOnu fetches Tech-Profile-ID from the KV-Store for the given onu based on the path
-// This path is formed as the following: {IntfID, OnuID, UniID}/tp_id
-func (RsrcMgr *OpenOltResourceMgr) GetTechProfileIDForOnu(ctx context.Context, IntfID uint32, OnuID uint32, UniID uint32) []uint32 {
-	Path := fmt.Sprintf(TpIDPathSuffix, IntfID, OnuID, UniID)
-	var Data []uint32
-	Value, err := RsrcMgr.KVStore.Get(ctx, Path)
+// This path is formed as the following: {intfID, onuID, uniID}/tp_id
+func (rsrcMgr *OpenOltResourceMgr) GetTechProfileIDForOnu(ctx context.Context, intfID uint32, onuID uint32, uniID uint32) []uint32 {
+	Path := fmt.Sprintf(tpIDPathSuffix, intfID, onuID, uniID)
+	// fetch from cache
+	rsrcMgr.techProfileIDsForOnuLock.RLock()
+	tpIDs, ok := rsrcMgr.techProfileIDsForOnu[Path]
+	rsrcMgr.techProfileIDsForOnuLock.RUnlock()
+	if ok {
+		return tpIDs
+	}
+	Value, err := rsrcMgr.KVStore.Get(ctx, Path)
 	if err == nil {
 		if Value != nil {
 			Val, err := kvstore.ToByte(Value.Value)
 			if err != nil {
-				logger.Errorw(ctx, "Failed to convert into byte array", log.Fields{"error": err})
-				return Data
+				logger.Errorw(ctx, "Failed to convert into byte array", log.Fields{"err": err})
+				return tpIDs
 			}
-			if err = json.Unmarshal(Val, &Data); err != nil {
-				logger.Error(ctx, "Failed to unmarshal", log.Fields{"error": err})
-				return Data
+			if err = json.Unmarshal(Val, &tpIDs); err != nil {
+				logger.Error(ctx, "Failed to unmarshal", log.Fields{"err": err})
+				return tpIDs
 			}
 		}
 	} else {
 		logger.Errorf(ctx, "Failed to get TP id from kvstore for path %s", Path)
 	}
-	logger.Debugf(ctx, "Getting TP id %d from path %s", Data, Path)
-	return Data
+	logger.Debugf(ctx, "Getting TP id %d from path %s", tpIDs, Path)
+
+	// update cache
+	rsrcMgr.techProfileIDsForOnuLock.Lock()
+	rsrcMgr.techProfileIDsForOnu[Path] = tpIDs
+	rsrcMgr.techProfileIDsForOnuLock.Unlock()
+
+	return tpIDs
 
 }
 
 // RemoveTechProfileIDsForOnu deletes all tech profile ids from the KV-Store for the given onu based on the path
-// This path is formed as the following: {IntfID, OnuID, UniID}/tp_id
-func (RsrcMgr *OpenOltResourceMgr) RemoveTechProfileIDsForOnu(ctx context.Context, IntfID uint32, OnuID uint32, UniID uint32) error {
-	IntfOnuUniID := fmt.Sprintf(TpIDPathSuffix, IntfID, OnuID, UniID)
-	if err := RsrcMgr.KVStore.Delete(ctx, IntfOnuUniID); err != nil {
-		logger.Errorw(ctx, "Failed to delete techprofile id resource in KV store", log.Fields{"path": IntfOnuUniID})
+// This path is formed as the following: {intfID, onuID, uniID}/tp_id
+func (rsrcMgr *OpenOltResourceMgr) RemoveTechProfileIDsForOnu(ctx context.Context, intfID uint32, onuID uint32, uniID uint32) error {
+	intfOnuUniID := fmt.Sprintf(tpIDPathSuffix, intfID, onuID, uniID)
+	// update cache
+	rsrcMgr.techProfileIDsForOnuLock.Lock()
+	delete(rsrcMgr.techProfileIDsForOnu, intfOnuUniID)
+	rsrcMgr.techProfileIDsForOnuLock.Unlock()
+
+	if err := rsrcMgr.KVStore.Delete(ctx, intfOnuUniID); err != nil {
+		logger.Errorw(ctx, "Failed to delete techprofile id resource in KV store", log.Fields{"path": intfOnuUniID})
 		return err
 	}
 	return nil
 }
 
 // RemoveTechProfileIDForOnu deletes a specific tech profile id from the KV-Store for the given onu based on the path
-// This path is formed as the following: {IntfID, OnuID, UniID}/tp_id
-func (RsrcMgr *OpenOltResourceMgr) RemoveTechProfileIDForOnu(ctx context.Context, IntfID uint32, OnuID uint32, UniID uint32, TpID uint32) error {
-	tpIDList := RsrcMgr.GetTechProfileIDForOnu(ctx, IntfID, OnuID, UniID)
+// This path is formed as the following: {intfID, onuID, uniID}/tp_id
+func (rsrcMgr *OpenOltResourceMgr) RemoveTechProfileIDForOnu(ctx context.Context, intfID uint32, onuID uint32, uniID uint32, tpID uint32) error {
+	tpIDList := rsrcMgr.GetTechProfileIDForOnu(ctx, intfID, onuID, uniID)
 	for i, tpIDInList := range tpIDList {
-		if tpIDInList == TpID {
+		if tpIDInList == tpID {
 			tpIDList = append(tpIDList[:i], tpIDList[i+1:]...)
 		}
 	}
-	IntfOnuUniID := fmt.Sprintf(TpIDPathSuffix, IntfID, OnuID, UniID)
+	intfOnuUniID := fmt.Sprintf(tpIDPathSuffix, intfID, onuID, uniID)
+	// update cache
+	rsrcMgr.techProfileIDsForOnuLock.Lock()
+	rsrcMgr.techProfileIDsForOnu[intfOnuUniID] = tpIDList
+	rsrcMgr.techProfileIDsForOnuLock.Unlock()
+
 	Value, err := json.Marshal(tpIDList)
 	if err != nil {
 		logger.Error(ctx, "failed to Marshal")
 		return err
 	}
-	if err = RsrcMgr.KVStore.Put(ctx, IntfOnuUniID, Value); err != nil {
-		logger.Errorf(ctx, "Failed to update resource %s", IntfOnuUniID)
+	if err = rsrcMgr.KVStore.Put(ctx, intfOnuUniID, Value); err != nil {
+		logger.Errorf(ctx, "Failed to update resource %s", intfOnuUniID)
 		return err
 	}
 	return err
 }
 
 // UpdateTechProfileIDForOnu updates (put) already present tech-profile-id for the given onu based on the path
-// This path is formed as the following: {IntfID, OnuID, UniID}/tp_id
-func (RsrcMgr *OpenOltResourceMgr) UpdateTechProfileIDForOnu(ctx context.Context, IntfID uint32, OnuID uint32,
-	UniID uint32, TpID uint32) error {
+// This path is formed as the following: {intfID, onuID, uniID}/tp_id
+func (rsrcMgr *OpenOltResourceMgr) UpdateTechProfileIDForOnu(ctx context.Context, intfID uint32, onuID uint32,
+	uniID uint32, tpID uint32) error {
 	var Value []byte
 	var err error
 
-	IntfOnuUniID := fmt.Sprintf(TpIDPathSuffix, IntfID, OnuID, UniID)
+	intfOnuUniID := fmt.Sprintf(tpIDPathSuffix, intfID, onuID, uniID)
 
-	tpIDList := RsrcMgr.GetTechProfileIDForOnu(ctx, IntfID, OnuID, UniID)
+	tpIDList := rsrcMgr.GetTechProfileIDForOnu(ctx, intfID, onuID, uniID)
 	for _, value := range tpIDList {
-		if value == TpID {
-			logger.Debugf(ctx, "TpID %d is already in tpIdList for the path %s", TpID, IntfOnuUniID)
+		if value == tpID {
+			logger.Debugf(ctx, "tpID %d is already in tpIdList for the path %s", tpID, intfOnuUniID)
 			return err
 		}
 	}
-	logger.Debugf(ctx, "updating tp id %d on path %s", TpID, IntfOnuUniID)
-	tpIDList = append(tpIDList, TpID)
+	logger.Debugf(ctx, "updating tp id %d on path %s", tpID, intfOnuUniID)
+	tpIDList = append(tpIDList, tpID)
+
+	// update cache
+	rsrcMgr.techProfileIDsForOnuLock.Lock()
+	rsrcMgr.techProfileIDsForOnu[intfOnuUniID] = tpIDList
+	rsrcMgr.techProfileIDsForOnuLock.Unlock()
+
 	Value, err = json.Marshal(tpIDList)
 	if err != nil {
 		logger.Error(ctx, "failed to Marshal")
 		return err
 	}
-	if err = RsrcMgr.KVStore.Put(ctx, IntfOnuUniID, Value); err != nil {
-		logger.Errorf(ctx, "Failed to update resource %s", IntfOnuUniID)
+	if err = rsrcMgr.KVStore.Put(ctx, intfOnuUniID, Value); err != nil {
+		logger.Errorf(ctx, "Failed to update resource %s", intfOnuUniID)
 		return err
 	}
 	return err
@@ -1054,41 +710,56 @@
 
 // StoreMeterInfoForOnu updates the meter id in the KV-Store for the given onu based on the path
 // This path is formed as the following: <(pon_id, onu_id, uni_id)>/<tp_id>/meter_id/<direction>
-func (RsrcMgr *OpenOltResourceMgr) StoreMeterInfoForOnu(ctx context.Context, Direction string, IntfID uint32, OnuID uint32,
-	UniID uint32, TpID uint32, meterInfo *MeterInfo) error {
+func (rsrcMgr *OpenOltResourceMgr) StoreMeterInfoForOnu(ctx context.Context, Direction string, intfID uint32, onuID uint32,
+	uniID uint32, tpID uint32, meterInfo *MeterInfo) error {
 	var Value []byte
 	var err error
-	IntfOnuUniID := fmt.Sprintf(MeterIDPathSuffix, IntfID, OnuID, UniID, TpID, Direction)
+	intfOnuUniID := fmt.Sprintf(MeterIDPathSuffix, intfID, onuID, uniID, tpID, Direction)
+
+	// update cache
+	rsrcMgr.meterInfoForOnuLock.Lock()
+	rsrcMgr.meterInfoForOnu[intfOnuUniID] = meterInfo
+	rsrcMgr.meterInfoForOnuLock.Unlock()
+
 	Value, err = json.Marshal(*meterInfo)
 	if err != nil {
 		logger.Error(ctx, "failed to Marshal meter config")
 		return err
 	}
-	if err = RsrcMgr.KVStore.Put(ctx, IntfOnuUniID, Value); err != nil {
-		logger.Errorf(ctx, "Failed to store meter into KV store %s", IntfOnuUniID)
+	if err = rsrcMgr.KVStore.Put(ctx, intfOnuUniID, Value); err != nil {
+		logger.Errorf(ctx, "Failed to store meter into KV store %s", intfOnuUniID)
 		return err
 	}
-	logger.Debugw(ctx, "meter info updated successfully", log.Fields{"path": IntfOnuUniID, "meter-info": meterInfo})
+	logger.Debugw(ctx, "meter info updated successfully", log.Fields{"path": intfOnuUniID, "meter-info": meterInfo})
 	return err
 }
 
 // GetMeterInfoForOnu fetches the meter id from the kv store for the given onu based on the path
 // This path is formed as the following: <(pon_id, onu_id, uni_id)>/<tp_id>/meter_id/<direction>
-func (RsrcMgr *OpenOltResourceMgr) GetMeterInfoForOnu(ctx context.Context, Direction string, IntfID uint32, OnuID uint32,
-	UniID uint32, TpID uint32) (*MeterInfo, error) {
-	Path := fmt.Sprintf(MeterIDPathSuffix, IntfID, OnuID, UniID, TpID, Direction)
+func (rsrcMgr *OpenOltResourceMgr) GetMeterInfoForOnu(ctx context.Context, Direction string, intfID uint32, onuID uint32,
+	uniID uint32, tpID uint32) (*MeterInfo, error) {
+	Path := fmt.Sprintf(MeterIDPathSuffix, intfID, onuID, uniID, tpID, Direction)
+
+	// get from cache
+	rsrcMgr.meterInfoForOnuLock.RLock()
+	val, ok := rsrcMgr.meterInfoForOnu[Path]
+	rsrcMgr.meterInfoForOnuLock.RUnlock()
+	if ok {
+		return val, nil
+	}
+
 	var meterInfo MeterInfo
-	Value, err := RsrcMgr.KVStore.Get(ctx, Path)
+	Value, err := rsrcMgr.KVStore.Get(ctx, Path)
 	if err == nil {
 		if Value != nil {
 			logger.Debug(ctx, "Found meter info in KV store", log.Fields{"Direction": Direction})
 			Val, er := kvstore.ToByte(Value.Value)
 			if er != nil {
-				logger.Errorw(ctx, "Failed to convert into byte array", log.Fields{"error": er})
+				logger.Errorw(ctx, "Failed to convert into byte array", log.Fields{"err": er})
 				return nil, er
 			}
 			if er = json.Unmarshal(Val, &meterInfo); er != nil {
-				logger.Error(ctx, "Failed to unmarshal meter info", log.Fields{"error": er})
+				logger.Error(ctx, "Failed to unmarshal meter info", log.Fields{"err": er})
 				return nil, er
 			}
 		} else {
@@ -1099,25 +770,30 @@
 		logger.Errorf(ctx, "Failed to get Meter config from kvstore for path %s", Path)
 
 	}
+	// update cache
+	rsrcMgr.meterInfoForOnuLock.Lock()
+	rsrcMgr.meterInfoForOnu[Path] = &meterInfo
+	rsrcMgr.meterInfoForOnuLock.Unlock()
+
 	return &meterInfo, err
 }
 
 // HandleMeterInfoRefCntUpdate increments or decrements the reference counter for a given meter.
 // When reference count becomes 0, it clears the meter information from the kv store
-func (RsrcMgr *OpenOltResourceMgr) HandleMeterInfoRefCntUpdate(ctx context.Context, Direction string,
-	IntfID uint32, OnuID uint32, UniID uint32, TpID uint32, increment bool) error {
-	meterInfo, err := RsrcMgr.GetMeterInfoForOnu(ctx, Direction, IntfID, OnuID, UniID, TpID)
+func (rsrcMgr *OpenOltResourceMgr) HandleMeterInfoRefCntUpdate(ctx context.Context, Direction string,
+	intfID uint32, onuID uint32, uniID uint32, tpID uint32, increment bool) error {
+	meterInfo, err := rsrcMgr.GetMeterInfoForOnu(ctx, Direction, intfID, onuID, uniID, tpID)
 	if err != nil {
 		return err
 	} else if meterInfo == nil {
 		// If we are increasing the reference count, we expect the meter information to be present on KV store.
 		// But if decrementing the reference count, the meter is possibly already cleared from KV store. Just log warn but do not return error.
 		if increment {
-			logger.Errorf(ctx, "error-fetching-meter-info-for-intf-%d-onu-%d-uni-%d-tp-id-%d-direction-%s", IntfID, OnuID, UniID, TpID, Direction)
-			return fmt.Errorf("error-fetching-meter-info-for-intf-%d-onu-%d-uni-%d-tp-id-%d-direction-%s", IntfID, OnuID, UniID, TpID, Direction)
+			logger.Errorf(ctx, "error-fetching-meter-info-for-intf-%d-onu-%d-uni-%d-tp-id-%d-direction-%s", intfID, onuID, uniID, tpID, Direction)
+			return fmt.Errorf("error-fetching-meter-info-for-intf-%d-onu-%d-uni-%d-tp-id-%d-direction-%s", intfID, onuID, uniID, tpID, Direction)
 		}
 		logger.Warnw(ctx, "meter is already cleared",
-			log.Fields{"intfID": IntfID, "onuID": OnuID, "uniID": UniID, "direction": Direction, "increment": increment})
+			log.Fields{"intfID": intfID, "onuID": onuID, "uniID": uniID, "direction": Direction, "increment": increment})
 		return nil
 	}
 
@@ -1127,13 +803,13 @@
 		meterInfo.RefCnt--
 		// If RefCnt become 0 clear the meter information from the DB.
 		if meterInfo.RefCnt == 0 {
-			if err := RsrcMgr.RemoveMeterInfoForOnu(ctx, Direction, IntfID, OnuID, UniID, TpID); err != nil {
+			if err := rsrcMgr.RemoveMeterInfoForOnu(ctx, Direction, intfID, onuID, uniID, tpID); err != nil {
 				return err
 			}
 			return nil
 		}
 	}
-	if err := RsrcMgr.StoreMeterInfoForOnu(ctx, Direction, IntfID, OnuID, UniID, TpID, meterInfo); err != nil {
+	if err := rsrcMgr.StoreMeterInfoForOnu(ctx, Direction, intfID, onuID, uniID, tpID, meterInfo); err != nil {
 		return err
 	}
 	return nil
@@ -1141,44 +817,44 @@
 
 // RemoveMeterInfoForOnu deletes the meter id from the kV-Store for the given onu based on the path
 // This path is formed as the following: <(pon_id, onu_id, uni_id)>/<tp_id>/meter_id/<direction>
-func (RsrcMgr *OpenOltResourceMgr) RemoveMeterInfoForOnu(ctx context.Context, Direction string, IntfID uint32, OnuID uint32,
-	UniID uint32, TpID uint32) error {
-	Path := fmt.Sprintf(MeterIDPathSuffix, IntfID, OnuID, UniID, TpID, Direction)
-	if err := RsrcMgr.KVStore.Delete(ctx, Path); err != nil {
+func (rsrcMgr *OpenOltResourceMgr) RemoveMeterInfoForOnu(ctx context.Context, Direction string, intfID uint32, onuID uint32,
+	uniID uint32, tpID uint32) error {
+	Path := fmt.Sprintf(MeterIDPathSuffix, intfID, onuID, uniID, tpID, Direction)
+
+	// update cache
+	rsrcMgr.meterInfoForOnuLock.Lock()
+	delete(rsrcMgr.meterInfoForOnu, Path)
+	rsrcMgr.meterInfoForOnuLock.Unlock()
+
+	if err := rsrcMgr.KVStore.Delete(ctx, Path); err != nil {
 		logger.Errorf(ctx, "Failed to delete meter id %s from kvstore ", Path)
 		return err
 	}
 	return nil
 }
 
-//AddGemToOnuGemInfo adds gemport to onugem info kvstore
-func (RsrcMgr *OpenOltResourceMgr) AddGemToOnuGemInfo(ctx context.Context, intfID uint32, onuID uint32, gemPort uint32) error {
-	var onuGemData []OnuGemInfo
-	var err error
-
-	if err = RsrcMgr.ResourceMgrs[intfID].GetOnuGemInfo(ctx, intfID, &onuGemData); err != nil {
+//AddGemToOnuGemInfo adds gemport to onugem info kvstore and also local cache
+func (rsrcMgr *OpenOltResourceMgr) AddGemToOnuGemInfo(ctx context.Context, intfID uint32, onuID uint32, gemPort uint32) error {
+	onugem, err := rsrcMgr.GetOnuGemInfo(ctx, intfID, onuID)
+	if err != nil || onugem == nil || onugem.SerialNumber == "" {
 		logger.Errorf(ctx, "failed to get onuifo for intfid %d", intfID)
 		return err
 	}
-	if len(onuGemData) == 0 {
-		logger.Errorw(ctx, "failed to ger Onuid info ", log.Fields{"intfid": intfID, "onuid": onuID})
-		return err
+	if onugem.OnuID == onuID {
+		for _, gem := range onugem.GemPorts {
+			if gem == gemPort {
+				logger.Debugw(ctx, "Gem already present in onugem info, skpping addition", log.Fields{"gem": gem})
+				return nil
+			}
+		}
+		logger.Debugw(ctx, "Added gem to onugem info", log.Fields{"gem": gemPort})
+		onugem.GemPorts = append(onugem.GemPorts, gemPort)
+	} else {
+		logger.Errorw(ctx, "onu id in OnuGemInfo does not match", log.Fields{"onuID": onuID, "ponIf": intfID, "onuGemInfoOnuID": onugem.OnuID})
+		return fmt.Errorf("onu-id-in-OnuGemInfo-does-not-match-%v", onuID)
 	}
 
-	for idx, onugem := range onuGemData {
-		if onugem.OnuID == onuID {
-			for _, gem := range onuGemData[idx].GemPorts {
-				if gem == gemPort {
-					logger.Debugw(ctx, "Gem already present in onugem info, skpping addition", log.Fields{"gem": gem})
-					return nil
-				}
-			}
-			logger.Debugw(ctx, "Added gem to onugem info", log.Fields{"gem": gemPort})
-			onuGemData[idx].GemPorts = append(onuGemData[idx].GemPorts, gemPort)
-			break
-		}
-	}
-	err = RsrcMgr.ResourceMgrs[intfID].AddOnuGemInfo(ctx, intfID, onuGemData)
+	err = rsrcMgr.AddOnuGemInfo(ctx, intfID, onuID, *onugem)
 	if err != nil {
 		logger.Error(ctx, "Failed to add onugem to kv store")
 		return err
@@ -1186,78 +862,161 @@
 	return err
 }
 
-//GetOnuGemInfo gets onu gem info from the kvstore per interface
-func (RsrcMgr *OpenOltResourceMgr) GetOnuGemInfo(ctx context.Context, IntfID uint32) ([]OnuGemInfo, error) {
-	var onuGemData []OnuGemInfo
+//RemoveGemFromOnuGemInfo removes gemport from onugem info on kvstore and also local cache
+func (rsrcMgr *OpenOltResourceMgr) RemoveGemFromOnuGemInfo(ctx context.Context, intfID uint32, onuID uint32, gemPort uint32) error {
+	onugem, err := rsrcMgr.GetOnuGemInfo(ctx, intfID, onuID)
+	if err != nil || onugem == nil || onugem.SerialNumber == "" {
+		logger.Errorf(ctx, "failed to get onuifo for intfid %d", intfID)
+		return err
+	}
+	updated := false
+	if onugem.OnuID == onuID {
+		for i, gem := range onugem.GemPorts {
+			if gem == gemPort {
+				logger.Debugw(ctx, "Gem found, removing from onu gem info", log.Fields{"gem": gem})
+				onugem.GemPorts = append(onugem.GemPorts[:i], onugem.GemPorts[i+1:]...)
+				updated = true
+				break
+			}
+		}
+	} else {
+		logger.Errorw(ctx, "onu id in OnuGemInfo does not match", log.Fields{"onuID": onuID, "ponIf": intfID, "onuGemInfoOnuID": onugem.OnuID})
+		return fmt.Errorf("onu-id-in-OnuGemInfo-does-not-match-%v", onuID)
+	}
+	if updated {
+		err = rsrcMgr.AddOnuGemInfo(ctx, intfID, onuID, *onugem)
+		if err != nil {
+			logger.Error(ctx, "Failed to add onugem to kv store")
+			return err
+		}
+	} else {
+		logger.Debugw(ctx, "Gem port not found in onu gem info", log.Fields{"gem": gemPort})
+	}
+	return nil
+}
 
-	if err := RsrcMgr.ResourceMgrs[IntfID].GetOnuGemInfo(ctx, IntfID, &onuGemData); err != nil {
-		logger.Errorf(ctx, "failed to get onuifo for intfid %d", IntfID)
+//GetOnuGemInfo gets onu gem info from the kvstore per interface
+func (rsrcMgr *OpenOltResourceMgr) GetOnuGemInfo(ctx context.Context, intfID uint32, onuID uint32) (*OnuGemInfo, error) {
+	var err error
+	var Val []byte
+	var onugem OnuGemInfo
+
+	path := fmt.Sprintf(OnuGemInfoPath, intfID, onuID)
+
+	rsrcMgr.onuGemInfoLock.RLock()
+	val, ok := rsrcMgr.onuGemInfo[path]
+	rsrcMgr.onuGemInfoLock.RUnlock()
+	if ok {
+		return val, nil
+	}
+	value, err := rsrcMgr.KVStore.Get(ctx, path)
+	if err != nil {
+		logger.Errorw(ctx, "Failed to get from kv store", log.Fields{"path": path})
+		return nil, err
+	} else if value == nil {
+		logger.Debug(ctx, "No onuinfo for path", log.Fields{"path": path})
+		return nil, nil // returning nil as this could happen if there are no onus for the interface yet
+	}
+	if Val, err = kvstore.ToByte(value.Value); err != nil {
+		logger.Error(ctx, "Failed to convert to byte array")
 		return nil, err
 	}
 
-	return onuGemData, nil
+	if err = json.Unmarshal(Val, &onugem); err != nil {
+		logger.Error(ctx, "Failed to unmarshall")
+		return nil, err
+	}
+	logger.Debugw(ctx, "found onugem info from path", log.Fields{"path": path, "onuGemInfo": onugem})
+	rsrcMgr.onuGemInfoLock.Lock()
+	rsrcMgr.onuGemInfo[path] = &onugem
+	rsrcMgr.onuGemInfoLock.Unlock()
+
+	return &onugem, nil
 }
 
 // AddOnuGemInfo adds onu info on to the kvstore per interface
-func (RsrcMgr *OpenOltResourceMgr) AddOnuGemInfo(ctx context.Context, IntfID uint32, onuGem OnuGemInfo) error {
-	var onuGemData []OnuGemInfo
+func (rsrcMgr *OpenOltResourceMgr) AddOnuGemInfo(ctx context.Context, intfID uint32, onuID uint32, onuGem OnuGemInfo) error {
+
+	var Value []byte
 	var err error
+	Path := fmt.Sprintf(OnuGemInfoPath, intfID, onuID)
 
-	if err = RsrcMgr.ResourceMgrs[IntfID].GetOnuGemInfo(ctx, IntfID, &onuGemData); err != nil {
-		logger.Errorf(ctx, "failed to get onuifo for intfid %d", IntfID)
-		return olterrors.NewErrPersistence("get", "OnuGemInfo", uint64(IntfID),
-			log.Fields{"onuGem": onuGem, "intfID": IntfID}, err)
-	}
-	onuGemData = append(onuGemData, onuGem)
-	err = RsrcMgr.ResourceMgrs[IntfID].AddOnuGemInfo(ctx, IntfID, onuGemData)
+	rsrcMgr.onuGemInfoLock.Lock()
+	rsrcMgr.onuGemInfo[Path] = &onuGem
+	rsrcMgr.onuGemInfoLock.Unlock()
+
+	Value, err = json.Marshal(onuGem)
 	if err != nil {
-		logger.Error(ctx, "Failed to add onugem to kv store")
-		return olterrors.NewErrPersistence("set", "OnuGemInfo", uint64(IntfID),
-			log.Fields{"onuGemData": onuGemData, "intfID": IntfID}, err)
+		logger.Error(ctx, "failed to Marshal")
+		return err
 	}
 
-	logger.Debugw(ctx, "added onu to onugeminfo", log.Fields{"intf": IntfID, "onugem": onuGem})
+	if err = rsrcMgr.KVStore.Put(ctx, Path, Value); err != nil {
+		logger.Errorf(ctx, "Failed to update resource %s", Path)
+		return err
+	}
+	logger.Debugw(ctx, "added onu gem info", log.Fields{"onuGemInfo": onuGem})
+	return err
+}
+
+// DelOnuGemInfo deletes the onugem info from kvstore per ONU
+func (rsrcMgr *OpenOltResourceMgr) DelOnuGemInfo(ctx context.Context, intfID uint32, onuID uint32) error {
+	path := fmt.Sprintf(OnuGemInfoPath, intfID, onuID)
+	rsrcMgr.onuGemInfoLock.Lock()
+	logger.Debugw(ctx, "removing onu gem info", log.Fields{"onuGemInfo": rsrcMgr.onuGemInfo[path]})
+	delete(rsrcMgr.onuGemInfo, path)
+	rsrcMgr.onuGemInfoLock.Unlock()
+
+	if err := rsrcMgr.KVStore.Delete(ctx, path); err != nil {
+		logger.Errorf(ctx, "failed to remove resource %s", path)
+		return err
+	}
 	return nil
 }
 
 // AddUniPortToOnuInfo adds uni port to the onuinfo kvstore. check if the uni is already present if not update the kv store.
-func (RsrcMgr *OpenOltResourceMgr) AddUniPortToOnuInfo(ctx context.Context, intfID uint32, onuID uint32, portNo uint32) {
-	var onuGemData []OnuGemInfo
-	var err error
+func (rsrcMgr *OpenOltResourceMgr) AddUniPortToOnuInfo(ctx context.Context, intfID uint32, onuID uint32, portNo uint32) {
 
-	if err = RsrcMgr.ResourceMgrs[intfID].GetOnuGemInfo(ctx, intfID, &onuGemData); err != nil {
-		logger.Errorf(ctx, "failed to get onuifo for intfid %d", intfID)
+	onugem, err := rsrcMgr.GetOnuGemInfo(ctx, intfID, onuID)
+	if err != nil || onugem == nil || onugem.SerialNumber == "" {
+		logger.Warnf(ctx, "failed to get onuifo for intfid %d", intfID)
 		return
 	}
-	for idx, onu := range onuGemData {
-		if onu.OnuID == onuID {
-			for _, uni := range onu.UniPorts {
-				if uni == portNo {
-					logger.Debugw(ctx, "uni already present in onugem info", log.Fields{"uni": portNo})
-					return
-				}
+
+	if onugem.OnuID == onuID {
+		for _, uni := range onugem.UniPorts {
+			if uni == portNo {
+				logger.Debugw(ctx, "uni already present in onugem info", log.Fields{"uni": portNo})
+				return
 			}
-			onuGemData[idx].UniPorts = append(onuGemData[idx].UniPorts, portNo)
-			break
 		}
+		onugem.UniPorts = append(onugem.UniPorts, portNo)
+	} else {
+		logger.Warnw(ctx, "onu id mismatch in onu gem info", log.Fields{"intfID": intfID, "onuID": onuID})
+		return
 	}
-	err = RsrcMgr.ResourceMgrs[intfID].AddOnuGemInfo(ctx, intfID, onuGemData)
+	err = rsrcMgr.AddOnuGemInfo(ctx, intfID, onuID, *onugem)
 	if err != nil {
-		logger.Errorw(ctx, "Failed to add uin port in onugem to kv store", log.Fields{"uni": portNo})
+		logger.Errorw(ctx, "Failed to add uni port in onugem to kv store", log.Fields{"uni": portNo})
 		return
 	}
 }
 
 //UpdateGemPortForPktIn updates gemport for pkt in path to kvstore, path being intfid, onuid, portno, vlan id, priority bit
-func (RsrcMgr *OpenOltResourceMgr) UpdateGemPortForPktIn(ctx context.Context, pktIn PacketInInfoKey, gemPort uint32) {
+func (rsrcMgr *OpenOltResourceMgr) UpdateGemPortForPktIn(ctx context.Context, pktIn PacketInInfoKey, gemPort uint32) {
 
 	path := fmt.Sprintf(OnuPacketINPath, pktIn.IntfID, pktIn.OnuID, pktIn.LogicalPort, pktIn.VlanID, pktIn.Priority)
+	// update cache
+	rsrcMgr.gemPortForPacketInInfoLock.Lock()
+	rsrcMgr.gemPortForPacketInInfo[path] = gemPort
+	rsrcMgr.gemPortForPacketInInfoLock.Unlock()
+
 	Value, err := json.Marshal(gemPort)
 	if err != nil {
 		logger.Error(ctx, "Failed to marshal data")
 		return
 	}
-	if err = RsrcMgr.KVStore.Put(ctx, path, Value); err != nil {
+	if err = rsrcMgr.KVStore.Put(ctx, path, Value); err != nil {
 		logger.Errorw(ctx, "Failed to put to kvstore", log.Fields{"path": path, "value": gemPort})
 		return
 	}
@@ -1265,15 +1024,22 @@
 }
 
 // GetGemPortFromOnuPktIn gets the gem port from onu pkt in path, path being intfid, onuid, portno, vlan id, priority bit
-func (RsrcMgr *OpenOltResourceMgr) GetGemPortFromOnuPktIn(ctx context.Context, packetInInfoKey PacketInInfoKey) (uint32, error) {
+func (rsrcMgr *OpenOltResourceMgr) GetGemPortFromOnuPktIn(ctx context.Context, packetInInfoKey PacketInInfoKey) (uint32, error) {
 
 	var Val []byte
-	var gemPort uint32
 
 	path := fmt.Sprintf(OnuPacketINPath, packetInInfoKey.IntfID, packetInInfoKey.OnuID, packetInInfoKey.LogicalPort,
 		packetInInfoKey.VlanID, packetInInfoKey.Priority)
+	// get from cache
+	rsrcMgr.gemPortForPacketInInfoLock.RLock()
+	gemPort, ok := rsrcMgr.gemPortForPacketInInfo[path]
+	rsrcMgr.gemPortForPacketInInfoLock.RUnlock()
+	if ok {
+		logger.Debugw(ctx, "found packein gemport from path", log.Fields{"path": path, "gem": gemPort})
+		return gemPort, nil
+	}
 
-	value, err := RsrcMgr.KVStore.Get(ctx, path)
+	value, err := rsrcMgr.KVStore.Get(ctx, path)
 	if err != nil {
 		logger.Errorw(ctx, "Failed to get from kv store", log.Fields{"path": path})
 		return uint32(0), err
@@ -1291,15 +1057,20 @@
 		return uint32(0), err
 	}
 	logger.Debugw(ctx, "found packein gemport from path", log.Fields{"path": path, "gem": gemPort})
+	// update cache
+	rsrcMgr.gemPortForPacketInInfoLock.Lock()
+	rsrcMgr.gemPortForPacketInInfo[path] = gemPort
+	rsrcMgr.gemPortForPacketInInfoLock.Unlock()
 
 	return gemPort, nil
 }
 
 //DeletePacketInGemPortForOnu deletes the packet-in gemport for ONU
-func (RsrcMgr *OpenOltResourceMgr) DeletePacketInGemPortForOnu(ctx context.Context, intfID uint32, onuID uint32, logicalPort uint32) error {
+func (rsrcMgr *OpenOltResourceMgr) DeletePacketInGemPortForOnu(ctx context.Context, intfID uint32, onuID uint32, logicalPort uint32) error {
 
 	path := fmt.Sprintf(OnuPacketINPathPrefix, intfID, onuID, logicalPort)
-	value, err := RsrcMgr.KVStore.List(ctx, path)
+
+	value, err := rsrcMgr.KVStore.List(ctx, path)
 	if err != nil {
 		logger.Errorf(ctx, "failed-to-read-value-from-path-%s", path)
 		return errors.New("failed-to-read-value-from-path-" + path)
@@ -1308,12 +1079,16 @@
 	//remove them one by one
 	for key := range value {
 		// Formulate the right key path suffix ti be delete
-		stringToBeReplaced := fmt.Sprintf(BasePathKvStore, RsrcMgr.KVStore.PathPrefix, RsrcMgr.DeviceID) + "/"
+		stringToBeReplaced := fmt.Sprintf(BasePathKvStore, rsrcMgr.KVStore.PathPrefix, rsrcMgr.DeviceID) + "/"
 		replacedWith := ""
 		key = strings.Replace(key, stringToBeReplaced, replacedWith, 1)
+		// update cache
+		rsrcMgr.gemPortForPacketInInfoLock.Lock()
+		delete(rsrcMgr.gemPortForPacketInInfo, key)
+		rsrcMgr.gemPortForPacketInInfoLock.Unlock()
 
 		logger.Debugf(ctx, "removing-key-%s", key)
-		if err := RsrcMgr.KVStore.Delete(ctx, key); err != nil {
+		if err := rsrcMgr.KVStore.Delete(ctx, key); err != nil {
 			logger.Errorf(ctx, "failed-to-remove-resource-%s", key)
 			return err
 		}
@@ -1322,222 +1097,156 @@
 	return nil
 }
 
-// DelOnuGemInfoForIntf deletes the onugem info from kvstore per interface
-func (RsrcMgr *OpenOltResourceMgr) DelOnuGemInfoForIntf(ctx context.Context, intfID uint32) error {
-	if err := RsrcMgr.ResourceMgrs[intfID].DelOnuGemInfoForIntf(ctx, intfID); err != nil {
-		logger.Errorw(ctx, "failed to delete onu gem info for", log.Fields{"intfid": intfID})
-		return err
+//GetFlowIDsForGem gets the list of FlowIDs for the given gemport
+func (rsrcMgr *OpenOltResourceMgr) GetFlowIDsForGem(ctx context.Context, intf uint32, gem uint32) ([]uint64, error) {
+	path := fmt.Sprintf(FlowIDsForGem, intf, gem)
+
+	// get from cache
+	rsrcMgr.flowIDsForGemLock.RLock()
+	flowIDs, ok := rsrcMgr.flowIDsForGem[gem]
+	rsrcMgr.flowIDsForGemLock.RUnlock()
+	if ok {
+		return flowIDs, nil
 	}
-	return nil
-}
 
-//GetNNIFromKVStore gets NNi intfids from kvstore. path being per device
-func (RsrcMgr *OpenOltResourceMgr) GetNNIFromKVStore(ctx context.Context) ([]uint32, error) {
-
-	var nni []uint32
-	var Val []byte
-
-	path := NnniIntfID
-	value, err := RsrcMgr.KVStore.Get(ctx, path)
+	value, err := rsrcMgr.KVStore.Get(ctx, path)
 	if err != nil {
-		logger.Error(ctx, "failed to get data from kv store")
+		logger.Errorw(ctx, "Failed to get from kv store", log.Fields{"path": path})
+		return nil, err
+	} else if value == nil {
+		logger.Debug(ctx, "no flow-ids found", log.Fields{"path": path})
+		return nil, nil
+	}
+	Val, err := kvstore.ToByte(value.Value)
+	if err != nil {
+		logger.Error(ctx, "Failed to convert to byte array")
 		return nil, err
 	}
-	if value != nil {
-		if Val, err = kvstore.ToByte(value.Value); err != nil {
-			logger.Error(ctx, "Failed to convert to byte array")
-			return nil, err
-		}
-		if err = json.Unmarshal(Val, &nni); err != nil {
-			logger.Error(ctx, "Failed to unmarshall")
-			return nil, err
-		}
-	}
-	return nni, err
-}
 
-// AddNNIToKVStore adds Nni interfaces to kvstore, path being per device.
-func (RsrcMgr *OpenOltResourceMgr) AddNNIToKVStore(ctx context.Context, nniIntf uint32) error {
-	var Value []byte
-
-	nni, err := RsrcMgr.GetNNIFromKVStore(ctx)
-	if err != nil {
-		logger.Error(ctx, "failed to fetch nni interfaces from kv store")
-		return err
+	if err = json.Unmarshal(Val, &flowIDs); err != nil {
+		logger.Error(ctx, "Failed to unmarshall")
+		return nil, err
 	}
 
-	path := NnniIntfID
-	nni = append(nni, nniIntf)
-	Value, err = json.Marshal(nni)
-	if err != nil {
-		logger.Error(ctx, "Failed to marshal data")
-	}
-	if err = RsrcMgr.KVStore.Put(ctx, path, Value); err != nil {
-		logger.Errorw(ctx, "Failed to put to kvstore", log.Fields{"path": path, "value": Value})
-		return err
-	}
-	logger.Debugw(ctx, "added nni to kv successfully", log.Fields{"path": path, "nni": nniIntf})
-	return nil
-}
+	// update cache
+	rsrcMgr.flowIDsForGemLock.Lock()
+	rsrcMgr.flowIDsForGem[gem] = flowIDs
+	rsrcMgr.flowIDsForGemLock.Unlock()
 
-// DelNNiFromKVStore deletes nni interface list from kv store.
-func (RsrcMgr *OpenOltResourceMgr) DelNNiFromKVStore(ctx context.Context) error {
-
-	path := NnniIntfID
-
-	if err := RsrcMgr.KVStore.Delete(ctx, path); err != nil {
-		logger.Errorw(ctx, "Failed to delete nni interfaces from kv store", log.Fields{"path": path})
-		return err
-	}
-	return nil
+	return flowIDs, nil
 }
 
 //UpdateFlowIDsForGem updates flow id per gemport
-func (RsrcMgr *OpenOltResourceMgr) UpdateFlowIDsForGem(ctx context.Context, intf uint32, gem uint32, flowIDs []uint64) error {
+func (rsrcMgr *OpenOltResourceMgr) UpdateFlowIDsForGem(ctx context.Context, intf uint32, gem uint32, flowIDs []uint64) error {
 	var val []byte
-	path := fmt.Sprintf(FlowIDsForGem, intf)
+	path := fmt.Sprintf(FlowIDsForGem, intf, gem)
 
-	flowsForGem, err := RsrcMgr.GetFlowIDsGemMapForInterface(ctx, intf)
-	if err != nil {
-		logger.Error(ctx, "Failed to ger flowids for interface", log.Fields{"error": err, "intf": intf})
-		return err
+	// update cache
+	rsrcMgr.flowIDsForGemLock.Lock()
+	rsrcMgr.flowIDsForGem[gem] = flowIDs
+	rsrcMgr.flowIDsForGemLock.Unlock()
+
+	if flowIDs == nil {
+		return nil
 	}
-	if flowsForGem == nil {
-		flowsForGem = make(map[uint32][]uint64)
-	}
-	flowsForGem[gem] = flowIDs
-	val, err = json.Marshal(flowsForGem)
+	val, err := json.Marshal(flowIDs)
 	if err != nil {
-		logger.Error(ctx, "Failed to marshal data", log.Fields{"error": err})
+		logger.Error(ctx, "Failed to marshal data", log.Fields{"err": err})
 		return err
 	}
 
-	if err = RsrcMgr.KVStore.Put(ctx, path, val); err != nil {
-		logger.Errorw(ctx, "Failed to put to kvstore", log.Fields{"error": err, "path": path, "value": val})
+	if err = rsrcMgr.KVStore.Put(ctx, path, val); err != nil {
+		logger.Errorw(ctx, "Failed to put to kvstore", log.Fields{"err": err, "path": path, "value": val})
 		return err
 	}
-	logger.Debugw(ctx, "added flowid list for gem to kv successfully", log.Fields{"path": path, "flowidlist": flowsForGem[gem]})
+	logger.Debugw(ctx, "added flowid list for gem to kv successfully", log.Fields{"path": path, "flowidlist": flowIDs})
 	return nil
 }
 
 //DeleteFlowIDsForGem deletes the flowID list entry per gem from kvstore.
-func (RsrcMgr *OpenOltResourceMgr) DeleteFlowIDsForGem(ctx context.Context, intf uint32, gem uint32) {
-	path := fmt.Sprintf(FlowIDsForGem, intf)
-	var val []byte
-
-	flowsForGem, err := RsrcMgr.GetFlowIDsGemMapForInterface(ctx, intf)
-	if err != nil {
-		logger.Error(ctx, "Failed to ger flowids for interface", log.Fields{"error": err, "intf": intf})
-		return
+func (rsrcMgr *OpenOltResourceMgr) DeleteFlowIDsForGem(ctx context.Context, intf uint32, gem uint32) {
+	path := fmt.Sprintf(FlowIDsForGem, intf, gem)
+	// update cache
+	rsrcMgr.flowIDsForGemLock.Lock()
+	delete(rsrcMgr.flowIDsForGem, gem)
+	rsrcMgr.flowIDsForGemLock.Unlock()
+	if err := rsrcMgr.KVStore.Delete(ctx, path); err != nil {
+		logger.Errorw(ctx, "Failed to delete from kvstore", log.Fields{"err": err, "path": path})
 	}
-	if flowsForGem == nil {
-		logger.Error(ctx, "No flowids found ", log.Fields{"intf": intf, "gemport": gem})
-		return
-	}
-	// once we get the flows per gem map from kv , just delete the gem entry from the map
-	delete(flowsForGem, gem)
-	// once gem entry is deleted update the kv store.
-	val, err = json.Marshal(flowsForGem)
-	if err != nil {
-		logger.Error(ctx, "Failed to marshal data", log.Fields{"error": err})
-		return
-	}
-
-	if err = RsrcMgr.KVStore.Put(ctx, path, val); err != nil {
-		logger.Errorw(ctx, "Failed to put to kvstore", log.Fields{"error": err, "path": path, "value": val})
-	}
-}
-
-//GetFlowIDsGemMapForInterface gets flowids per gemport and interface
-func (RsrcMgr *OpenOltResourceMgr) GetFlowIDsGemMapForInterface(ctx context.Context, intf uint32) (map[uint32][]uint64, error) {
-	path := fmt.Sprintf(FlowIDsForGem, intf)
-	var flowsForGem map[uint32][]uint64
-	var val []byte
-	value, err := RsrcMgr.KVStore.Get(ctx, path)
-	if err != nil {
-		logger.Error(ctx, "failed to get data from kv store")
-		return nil, err
-	}
-	if value != nil && value.Value != nil {
-		if val, err = kvstore.ToByte(value.Value); err != nil {
-			logger.Error(ctx, "Failed to convert to byte array ", log.Fields{"error": err})
-			return nil, err
-		}
-		if err = json.Unmarshal(val, &flowsForGem); err != nil {
-			logger.Error(ctx, "Failed to unmarshall", log.Fields{"error": err})
-			return nil, err
-		}
-	}
-	return flowsForGem, nil
-}
-
-//DeleteIntfIDGempMapPath deletes the intf id path used to store flow ids per gem to kvstore.
-func (RsrcMgr *OpenOltResourceMgr) DeleteIntfIDGempMapPath(ctx context.Context, intf uint32) {
-	path := fmt.Sprintf(FlowIDsForGem, intf)
-
-	if err := RsrcMgr.KVStore.Delete(ctx, path); err != nil {
-		logger.Errorw(ctx, "Failed to delete nni interfaces from kv store", log.Fields{"path": path})
-	}
-}
-
-// RemoveResourceMap Clear resource map associated with (intfid, onuid, uniid) tuple.
-func (RsrcMgr *OpenOltResourceMgr) RemoveResourceMap(ctx context.Context, intfID uint32, onuID int32, uniID int32) {
-	IntfOnuIDUniID := fmt.Sprintf("%d,%d,%d", intfID, onuID, uniID)
-	RsrcMgr.ResourceMgrs[intfID].RemoveResourceMap(ctx, IntfOnuIDUniID)
 }
 
 //GetMcastQueuePerInterfaceMap gets multicast queue info per pon interface
-func (RsrcMgr *OpenOltResourceMgr) GetMcastQueuePerInterfaceMap(ctx context.Context) (map[uint32][]uint32, error) {
+func (rsrcMgr *OpenOltResourceMgr) GetMcastQueuePerInterfaceMap(ctx context.Context) (map[uint32][]uint32, error) {
 	path := McastQueuesForIntf
-	var mcastQueueToIntfMap map[uint32][]uint32
 	var val []byte
 
-	kvPair, err := RsrcMgr.KVStore.Get(ctx, path)
+	rsrcMgr.mcastQueueForIntfLock.RLock()
+	if rsrcMgr.mcastQueueForIntfLoadedFromKvStore {
+		rsrcMgr.mcastQueueForIntfLock.RUnlock()
+		return rsrcMgr.mcastQueueForIntf, nil
+	}
+	rsrcMgr.mcastQueueForIntfLock.RUnlock()
+
+	kvPair, err := rsrcMgr.KVStore.Get(ctx, path)
 	if err != nil {
 		logger.Error(ctx, "failed to get data from kv store")
 		return nil, err
 	}
 	if kvPair != nil && kvPair.Value != nil {
 		if val, err = kvstore.ToByte(kvPair.Value); err != nil {
-			logger.Error(ctx, "Failed to convert to byte array ", log.Fields{"error": err})
+			logger.Error(ctx, "Failed to convert to byte array ", log.Fields{"err": err})
 			return nil, err
 		}
-		if err = json.Unmarshal(val, &mcastQueueToIntfMap); err != nil {
-			logger.Error(ctx, "Failed to unmarshall ", log.Fields{"error": err})
+		rsrcMgr.mcastQueueForIntfLock.Lock()
+		defer rsrcMgr.mcastQueueForIntfLock.Unlock()
+		if err = json.Unmarshal(val, &rsrcMgr.mcastQueueForIntf); err != nil {
+			logger.Error(ctx, "Failed to unmarshall ", log.Fields{"err": err})
 			return nil, err
 		}
+		rsrcMgr.mcastQueueForIntfLoadedFromKvStore = true
 	}
-	return mcastQueueToIntfMap, nil
+	return rsrcMgr.mcastQueueForIntf, nil
 }
 
 //AddMcastQueueForIntf adds multicast queue for pon interface
-func (RsrcMgr *OpenOltResourceMgr) AddMcastQueueForIntf(ctx context.Context, intf uint32, gem uint32, servicePriority uint32) error {
+func (rsrcMgr *OpenOltResourceMgr) AddMcastQueueForIntf(ctx context.Context, intf uint32, gem uint32, servicePriority uint32) error {
 	var val []byte
 	path := McastQueuesForIntf
 
-	mcastQueues, err := RsrcMgr.GetMcastQueuePerInterfaceMap(ctx)
+	// Load local cache from kv store the first time
+	rsrcMgr.mcastQueueForIntfLock.RLock()
+	if !rsrcMgr.mcastQueueForIntfLoadedFromKvStore {
+		rsrcMgr.mcastQueueForIntfLock.RUnlock()
+		_, err := rsrcMgr.GetMcastQueuePerInterfaceMap(ctx)
+		if err != nil {
+			logger.Errorw(ctx, "Failed to get multicast queue info for interface", log.Fields{"err": err, "intf": intf})
+			return err
+		}
+	} else {
+		rsrcMgr.mcastQueueForIntfLock.RUnlock()
+	}
+
+	// Update KV store
+	rsrcMgr.mcastQueueForIntfLock.Lock()
+	rsrcMgr.mcastQueueForIntf[intf] = []uint32{gem, servicePriority}
+	val, err := json.Marshal(rsrcMgr.mcastQueueForIntf)
 	if err != nil {
-		logger.Errorw(ctx, "Failed to get multicast queue info for interface", log.Fields{"error": err, "intf": intf})
+		rsrcMgr.mcastQueueForIntfLock.Unlock()
+		logger.Errorw(ctx, "Failed to marshal data", log.Fields{"err": err})
 		return err
 	}
-	if mcastQueues == nil {
-		mcastQueues = make(map[uint32][]uint32)
-	}
-	mcastQueues[intf] = []uint32{gem, servicePriority}
-	if val, err = json.Marshal(mcastQueues); err != nil {
-		logger.Errorw(ctx, "Failed to marshal data", log.Fields{"error": err})
+	rsrcMgr.mcastQueueForIntfLock.Unlock()
+
+	if err = rsrcMgr.KVStore.Put(ctx, path, val); err != nil {
+		logger.Errorw(ctx, "Failed to put to kvstore", log.Fields{"err": err, "path": path, "value": val})
 		return err
 	}
-	if err = RsrcMgr.KVStore.Put(ctx, path, val); err != nil {
-		logger.Errorw(ctx, "Failed to put to kvstore", log.Fields{"error": err, "path": path, "value": val})
-		return err
-	}
-	logger.Debugw(ctx, "added multicast queue info to KV store successfully", log.Fields{"path": path, "mcastQueueInfo": mcastQueues[intf], "interfaceId": intf})
+	logger.Debugw(ctx, "added multicast queue info to KV store successfully", log.Fields{"path": path, "interfaceId": intf, "gem": gem, "svcPrior": servicePriority})
 	return nil
 }
 
 //AddFlowGroupToKVStore adds flow group into KV store
-func (RsrcMgr *OpenOltResourceMgr) AddFlowGroupToKVStore(ctx context.Context, groupEntry *ofp.OfpGroupEntry, cached bool) error {
+func (rsrcMgr *OpenOltResourceMgr) AddFlowGroupToKVStore(ctx context.Context, groupEntry *ofp.OfpGroupEntry, cached bool) error {
 	var Value []byte
 	var err error
 	var path string
@@ -1560,6 +1269,10 @@
 		OutPorts: outPorts,
 	}
 
+	rsrcMgr.groupInfoLock.Lock()
+	rsrcMgr.groupInfo[path] = &groupInfo
+	rsrcMgr.groupInfoLock.Unlock()
+
 	Value, err = json.Marshal(groupInfo)
 
 	if err != nil {
@@ -1567,7 +1280,7 @@
 		return err
 	}
 
-	if err = RsrcMgr.KVStore.Put(ctx, path, Value); err != nil {
+	if err = rsrcMgr.KVStore.Put(ctx, path, Value); err != nil {
 		logger.Errorf(ctx, "Failed to update resource %s", path)
 		return err
 	}
@@ -1575,14 +1288,18 @@
 }
 
 //RemoveFlowGroupFromKVStore removes flow group from KV store
-func (RsrcMgr *OpenOltResourceMgr) RemoveFlowGroupFromKVStore(ctx context.Context, groupID uint32, cached bool) error {
+func (rsrcMgr *OpenOltResourceMgr) RemoveFlowGroupFromKVStore(ctx context.Context, groupID uint32, cached bool) error {
 	var path string
 	if cached {
 		path = fmt.Sprintf(FlowGroupCached, groupID)
 	} else {
 		path = fmt.Sprintf(FlowGroup, groupID)
 	}
-	if err := RsrcMgr.KVStore.Delete(ctx, path); err != nil {
+	rsrcMgr.groupInfoLock.Lock()
+	delete(rsrcMgr.groupInfo, path)
+	rsrcMgr.groupInfoLock.Unlock()
+
+	if err := rsrcMgr.KVStore.Delete(ctx, path); err != nil {
 		logger.Errorf(ctx, "Failed to remove resource %s due to %s", path, err)
 		return err
 	}
@@ -1592,7 +1309,7 @@
 //GetFlowGroupFromKVStore fetches flow group from the KV store. Returns (false, {} error) if any problem occurs during
 //fetching the data. Returns (true, groupInfo, nil) if the group is fetched successfully.
 // Returns (false, {}, nil) if the group does not exists in the KV store.
-func (RsrcMgr *OpenOltResourceMgr) GetFlowGroupFromKVStore(ctx context.Context, groupID uint32, cached bool) (bool, GroupInfo, error) {
+func (rsrcMgr *OpenOltResourceMgr) GetFlowGroupFromKVStore(ctx context.Context, groupID uint32, cached bool) (bool, GroupInfo, error) {
 	var groupInfo GroupInfo
 	var path string
 	if cached {
@@ -1600,20 +1317,34 @@
 	} else {
 		path = fmt.Sprintf(FlowGroup, groupID)
 	}
-	kvPair, err := RsrcMgr.KVStore.Get(ctx, path)
+
+	// read from cache
+	rsrcMgr.groupInfoLock.RLock()
+	gi, ok := rsrcMgr.groupInfo[path]
+	rsrcMgr.groupInfoLock.RUnlock()
+	if ok {
+		return true, *gi, nil
+	}
+
+	kvPair, err := rsrcMgr.KVStore.Get(ctx, path)
 	if err != nil {
 		return false, groupInfo, err
 	}
 	if kvPair != nil && kvPair.Value != nil {
 		Val, err := kvstore.ToByte(kvPair.Value)
 		if err != nil {
-			logger.Errorw(ctx, "Failed to convert flow group into byte array", log.Fields{"error": err})
+			logger.Errorw(ctx, "Failed to convert flow group into byte array", log.Fields{"err": err})
 			return false, groupInfo, err
 		}
 		if err = json.Unmarshal(Val, &groupInfo); err != nil {
-			logger.Errorw(ctx, "Failed to unmarshal", log.Fields{"error": err})
+			logger.Errorw(ctx, "Failed to unmarshal", log.Fields{"err": err})
 			return false, groupInfo, err
 		}
+		// update cache
+		rsrcMgr.groupInfoLock.Lock()
+		rsrcMgr.groupInfo[path] = &groupInfo
+		rsrcMgr.groupInfoLock.Unlock()
+
 		return true, groupInfo, nil
 	}
 	return false, groupInfo, nil
@@ -1631,19 +1362,3 @@
 		return nil, fmt.Errorf("unexpected-type-%T", t)
 	}
 }
-
-func checkForFlowIDInList(FlowIDList []uint64, FlowID uint64) (bool, uint64) {
-	/*
-	   Check for a flow id in a given list of flow IDs.
-	   :param FLowIDList: List of Flow IDs
-	   :param FlowID: Flowd to check in the list
-	   : return true and the index if present false otherwise.
-	*/
-
-	for idx := range FlowIDList {
-		if FlowID == FlowIDList[idx] {
-			return true, uint64(idx)
-		}
-	}
-	return false, 0
-}
diff --git a/internal/pkg/resourcemanager/resourcemanager_test.go b/internal/pkg/resourcemanager/resourcemanager_test.go
index 53f8898..443f418 100644
--- a/internal/pkg/resourcemanager/resourcemanager_test.go
+++ b/internal/pkg/resourcemanager/resourcemanager_test.go
@@ -27,19 +27,18 @@
 	"context"
 	"encoding/json"
 	"errors"
-	tp "github.com/opencord/voltha-lib-go/v4/pkg/techprofile"
+	"github.com/opencord/voltha-openolt-adapter/pkg/mocks"
 	"reflect"
 	"strconv"
 	"strings"
-	"sync"
 	"testing"
 	"time"
 
-	"github.com/opencord/voltha-lib-go/v4/pkg/db"
-	"github.com/opencord/voltha-lib-go/v4/pkg/db/kvstore"
-	fu "github.com/opencord/voltha-lib-go/v4/pkg/flows"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
-	ponrmgr "github.com/opencord/voltha-lib-go/v4/pkg/ponresourcemanager"
+	"github.com/opencord/voltha-lib-go/v5/pkg/db"
+	"github.com/opencord/voltha-lib-go/v5/pkg/db/kvstore"
+	fu "github.com/opencord/voltha-lib-go/v5/pkg/flows"
+	"github.com/opencord/voltha-lib-go/v5/pkg/log"
+	ponrmgr "github.com/opencord/voltha-lib-go/v5/pkg/ponresourcemanager"
 	ofp "github.com/opencord/voltha-protos/v4/go/openflow_13"
 	"github.com/opencord/voltha-protos/v4/go/openolt"
 )
@@ -77,7 +76,7 @@
 	KVStore       *db.Backend
 	DeviceType    string
 	DevInfo       *openolt.DeviceInfo
-	ResourceMgrs  map[uint32]*ponrmgr.PONResourceManager
+	PonRsrMgr     *ponrmgr.PONResourceManager
 	NumOfPonPorts uint32
 }
 
@@ -87,12 +86,11 @@
 
 // getResMgr mocks OpenOltResourceMgr struct.
 func getResMgr() *fields {
-	ctx := context.TODO()
 	var resMgr fields
 	resMgr.KVStore = &db.Backend{
 		Client: &MockResKVClient{},
 	}
-	resMgr.ResourceMgrs = make(map[uint32]*ponrmgr.PONResourceManager)
+	resMgr.PonRsrMgr = &ponrmgr.PONResourceManager{}
 	ranges := make(map[string]interface{})
 	sharedIdxByType := make(map[string]string)
 	sharedIdxByType["ALLOC_ID"] = "ALLOC_ID"
@@ -108,25 +106,22 @@
 	ranges["gemport_id_shared"] = uint32(0)
 	ranges["flow_id_shared"] = uint32(0)
 	resMgr.NumOfPonPorts = 16
-	ponMgr := &ponrmgr.PONResourceManager{}
-	tpMgr, err := tp.NewTechProfile(ctx, ponMgr, "etcd", "127.0.0.1", "/")
-	if err != nil {
-		logger.Fatal(ctx, err.Error())
-	}
-
-	ponMgr.DeviceID = "onu-1"
-	ponMgr.IntfIDs = []uint32{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
-	ponMgr.KVStore = &db.Backend{
+	resMgr.PonRsrMgr.DeviceID = "onu-1"
+	resMgr.PonRsrMgr.IntfIDs = []uint32{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
+	resMgr.PonRsrMgr.KVStore = &db.Backend{
 		Client: &MockResKVClient{},
 	}
-	ponMgr.PonResourceRanges = ranges
-	ponMgr.SharedIdxByType = sharedIdxByType
-	ponMgr.TechProfileMgr = tpMgr
+	resMgr.PonRsrMgr.Technology = "XGS-PON"
+	resMgr.PonRsrMgr.PonResourceRanges = ranges
+	resMgr.PonRsrMgr.SharedIdxByType = sharedIdxByType
+	/*
+		tpMgr, err := tp.NewTechProfile(ctx, resMgr.PonRsrMgr, "etcd", "127.0.0.1", "/")
+		if err != nil {
+			logger.Fatal(ctx, err.Error())
+		}
+	*/
+	resMgr.PonRsrMgr.TechProfileMgr = &mocks.MockTechProfile{TpID: 64}
 
-	var ponIntf uint32
-	for ponIntf = 0; ponIntf < resMgr.NumOfPonPorts; ponIntf++ {
-		resMgr.ResourceMgrs[ponIntf] = ponMgr
-	}
 	return &resMgr
 }
 
@@ -265,18 +260,15 @@
 // testResMgrObject maps fields type to OpenOltResourceMgr type.
 func testResMgrObject(testResMgr *fields) *OpenOltResourceMgr {
 	var rsrMgr = OpenOltResourceMgr{
-		DeviceID:     testResMgr.DeviceID,
-		Args:         testResMgr.Args,
-		KVStore:      testResMgr.KVStore,
-		DeviceType:   testResMgr.DeviceType,
-		Address:      testResMgr.Address,
-		DevInfo:      testResMgr.DevInfo,
-		ResourceMgrs: testResMgr.ResourceMgrs,
+		DeviceID:   testResMgr.DeviceID,
+		Args:       testResMgr.Args,
+		KVStore:    testResMgr.KVStore,
+		DeviceType: testResMgr.DeviceType,
+		Address:    testResMgr.Address,
+		DevInfo:    testResMgr.DevInfo,
+		PonRsrMgr:  testResMgr.PonRsrMgr,
 	}
-
-	rsrMgr.AllocIDMgmtLock = make([]sync.RWMutex, testResMgr.NumOfPonPorts)
-	rsrMgr.GemPortIDMgmtLock = make([]sync.RWMutex, testResMgr.NumOfPonPorts)
-	rsrMgr.OnuIDMgmtLock = make([]sync.RWMutex, testResMgr.NumOfPonPorts)
+	rsrMgr.InitLocalCache()
 
 	return &rsrMgr
 }
@@ -284,6 +276,7 @@
 func TestNewResourceMgr(t *testing.T) {
 	type args struct {
 		deviceID       string
+		intfID         uint32
 		KVStoreAddress string
 		kvStoreType    string
 		deviceType     string
@@ -295,14 +288,14 @@
 		args args
 		want *OpenOltResourceMgr
 	}{
-		{"NewResourceMgr-2", args{"olt1", "1:2", "etcd",
+		{"NewResourceMgr-2", args{"olt1", 0, "1:2", "etcd",
 			"onu", &openolt.DeviceInfo{OnuIdStart: 1, OnuIdEnd: 1}, "service/voltha"}, &OpenOltResourceMgr{}},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 			defer cancel()
-			if got := NewResourceMgr(ctx, tt.args.deviceID, tt.args.KVStoreAddress, tt.args.kvStoreType, tt.args.deviceType, tt.args.devInfo, tt.args.kvStorePrefix); reflect.TypeOf(got) != reflect.TypeOf(tt.want) {
+			if got := NewResourceMgr(ctx, tt.args.intfID, tt.args.deviceID, tt.args.KVStoreAddress, tt.args.kvStoreType, tt.args.deviceType, tt.args.devInfo, tt.args.kvStorePrefix); reflect.TypeOf(got) != reflect.TypeOf(tt.want) {
 				t.Errorf("NewResourceMgr() = %v, want %v", got, tt.want)
 			}
 		})
@@ -310,19 +303,23 @@
 }
 
 func TestOpenOltResourceMgr_Delete(t *testing.T) {
+	type args struct {
+		intfID uint32
+	}
 	tests := []struct {
 		name    string
 		fields  *fields
 		wantErr error
+		args    args
 	}{
-		{"Delete-1", getResMgr(), errors.New("failed to clear device resource pool")},
+		{"Delete-1", getResMgr(), errors.New("failed to clear device resource pool"), args{intfID: 0}},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			RsrcMgr := testResMgrObject(tt.fields)
 			ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 			defer cancel()
-			if err := RsrcMgr.Delete(ctx); (err != nil) && reflect.TypeOf(err) != reflect.TypeOf(tt.wantErr) {
+			if err := RsrcMgr.Delete(ctx, tt.args.intfID); (err != nil) && reflect.TypeOf(err) != reflect.TypeOf(tt.wantErr) {
 				t.Errorf("Delete() error = %v, wantErr %v", err, tt.wantErr)
 			}
 		})
@@ -374,33 +371,6 @@
 	}
 }
 
-func TestOpenOltResourceMgr_GetAllocID(t *testing.T) {
-
-	type args struct {
-		intfID uint32
-		onuID  uint32
-		uniID  uint32
-	}
-	tests := []struct {
-		name   string
-		fields *fields
-		args   args
-		want   uint32
-	}{
-		{"GetAllocID-1", getResMgr(), args{1, 2, 2}, 0},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			RsrcMgr := testResMgrObject(tt.fields)
-			ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-			defer cancel()
-			if got := RsrcMgr.GetAllocID(ctx, tt.args.intfID, tt.args.onuID, tt.args.uniID); reflect.TypeOf(got) != reflect.TypeOf(tt.want) {
-				t.Errorf("GetAllocID() = %v, want %v", got, tt.want)
-			}
-		})
-	}
-}
-
 func TestOpenOltResourceMgr_GetCurrentAllocIDForOnu(t *testing.T) {
 	type args struct {
 		intfID uint32
@@ -420,8 +390,16 @@
 			RsrcMgr := testResMgrObject(tt.fields)
 			ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 			defer cancel()
-			if got := RsrcMgr.GetCurrentAllocIDsForOnu(ctx, tt.args.intfID, tt.args.onuID, tt.args.uniID); !reflect.DeepEqual(got, tt.want) {
+			got := RsrcMgr.GetCurrentAllocIDsForOnu(ctx, tt.args.intfID, tt.args.onuID, tt.args.uniID)
+			if len(got) != len(tt.want) {
 				t.Errorf("GetCurrentAllocIDsForOnu() = %v, want %v", got, tt.want)
+			} else {
+				for i := range tt.want {
+					if got[i] != tt.want[i] {
+						t.Errorf("GetCurrentAllocIDsForOnu() = %v, want %v", got, tt.want)
+						break
+					}
+				}
 			}
 		})
 	}
@@ -484,40 +462,6 @@
 	}
 }
 
-func TestOpenOltResourceMgr_GetGEMPortID(t *testing.T) {
-	type args struct {
-		ponPort    uint32
-		onuID      uint32
-		uniID      uint32
-		NumOfPorts uint32
-	}
-	tests := []struct {
-		name    string
-		fields  *fields
-		args    args
-		want    []uint32
-		wantErr error
-	}{
-		{"GetGEMPortID-1", getResMgr(), args{1, 2, 2, 2}, []uint32{},
-			errors.New("failed to get gem port")},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			RsrcMgr := testResMgrObject(tt.fields)
-			ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-			defer cancel()
-			got, err := RsrcMgr.GetGEMPortID(ctx, tt.args.ponPort, tt.args.onuID, tt.args.uniID, tt.args.NumOfPorts)
-			if reflect.TypeOf(err) != reflect.TypeOf(tt.wantErr) && err != nil {
-				t.Errorf("GetGEMPortID() error = %v, wantErr %v", err, tt.wantErr)
-				return
-			}
-			if reflect.TypeOf(got) != reflect.TypeOf(tt.want) {
-				t.Errorf("GetGEMPortID() got = %v, want %v", got, tt.want)
-			}
-		})
-	}
-}
-
 func TestOpenOltResourceMgr_GetMeterInfoForOnu(t *testing.T) {
 	type args struct {
 		Direction string
@@ -693,34 +637,6 @@
 	}
 }
 
-func TestOpenOltResourceMgr_UpdateFlowIDInfo(t *testing.T) {
-	type args struct {
-		ponIntfID int32
-		onuID     int32
-		uniID     int32
-		flowID    uint64
-		flowData  FlowInfo
-	}
-	tests := []struct {
-		name    string
-		fields  *fields
-		args    args
-		wantErr error
-	}{
-		{"UpdateFlowIDInfo-1", getResMgr(), args{1, 2, 2, 2, FlowInfo{}}, errors.New("")},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			RsrcMgr := testResMgrObject(tt.fields)
-			ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-			defer cancel()
-			if err := RsrcMgr.UpdateFlowIDInfo(ctx, uint32(tt.args.ponIntfID), tt.args.onuID, tt.args.uniID, tt.args.flowID, tt.args.flowData); err != nil && reflect.TypeOf(err) != reflect.TypeOf(tt.wantErr) {
-				t.Errorf("UpdateFlowIDInfo() error = %v, wantErr %v", err, tt.wantErr)
-			}
-		})
-	}
-}
-
 func TestOpenOltResourceMgr_UpdateGEMPortIDsForOnu(t *testing.T) {
 
 	type args struct {
@@ -750,35 +666,6 @@
 	}
 }
 
-func TestOpenOltResourceMgr_UpdateGEMportsPonportToOnuMapOnKVStore(t *testing.T) {
-	type args struct {
-		gemPorts []uint32
-		PonPort  uint32
-		onuID    uint32
-		uniID    uint32
-	}
-	tests := []struct {
-		name    string
-		fields  *fields
-		args    args
-		wantErr error
-	}{
-		{"UpdateGEMportsPonportToOnuMapOnKVStore-1", getResMgr(), args{[]uint32{1, 2},
-			1, 2, 2}, errors.New("failed to update resource")},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			RsrcMgr := testResMgrObject(tt.fields)
-			ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-			defer cancel()
-			if err := RsrcMgr.UpdateGEMportsPonportToOnuMapOnKVStore(ctx, tt.args.gemPorts, tt.args.PonPort,
-				tt.args.onuID, tt.args.uniID); err != nil && reflect.TypeOf(err) != reflect.TypeOf(tt.wantErr) {
-				t.Errorf("UpdateGEMportsPonportToOnuMapOnKVStore() error = %v, wantErr %v", err, tt.wantErr)
-			}
-		})
-	}
-}
-
 func TestOpenOltResourceMgr_UpdateMeterIDForOnu(t *testing.T) {
 	type args struct {
 		Direction string