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
+		}
+	}
+}