[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/coreos/etcd/mvcc/kvstore_compaction.go b/vendor/github.com/coreos/etcd/mvcc/kvstore_compaction.go
new file mode 100644
index 0000000..082a33f
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/mvcc/kvstore_compaction.go
@@ -0,0 +1,69 @@
+// Copyright 2015 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package mvcc
+
+import (
+ "encoding/binary"
+ "time"
+)
+
+func (s *store) scheduleCompaction(compactMainRev int64, keep map[revision]struct{}) bool {
+ totalStart := time.Now()
+ defer func() { dbCompactionTotalDurations.Observe(float64(time.Since(totalStart) / time.Millisecond)) }()
+ keyCompactions := 0
+ defer func() { dbCompactionKeysCounter.Add(float64(keyCompactions)) }()
+
+ end := make([]byte, 8)
+ binary.BigEndian.PutUint64(end, uint64(compactMainRev+1))
+
+ batchsize := int64(10000)
+ last := make([]byte, 8+1+8)
+ for {
+ var rev revision
+
+ start := time.Now()
+ tx := s.b.BatchTx()
+ tx.Lock()
+
+ keys, _ := tx.UnsafeRange(keyBucketName, last, end, batchsize)
+ for _, key := range keys {
+ rev = bytesToRev(key)
+ if _, ok := keep[rev]; !ok {
+ tx.UnsafeDelete(keyBucketName, key)
+ keyCompactions++
+ }
+ }
+
+ if len(keys) < int(batchsize) {
+ rbytes := make([]byte, 8+1+8)
+ revToBytes(revision{main: compactMainRev}, rbytes)
+ tx.UnsafePut(metaBucketName, finishedCompactKeyName, rbytes)
+ tx.Unlock()
+ plog.Printf("finished scheduled compaction at %d (took %v)", compactMainRev, time.Since(totalStart))
+ return true
+ }
+
+ // update last
+ revToBytes(revision{main: rev.main, sub: rev.sub + 1}, last)
+ tx.Unlock()
+ dbCompactionPauseDurations.Observe(float64(time.Since(start) / time.Millisecond))
+
+ select {
+ case <-time.After(100 * time.Millisecond):
+ case <-s.stopc:
+ return false
+ }
+ }
+}