Revision 939912c4258389e087454d42b3e546c0fa663a4e authored by Hitoshi Mitake on 24 April 2017, 06:50:00 UTC, committed by Hitoshi Mitake on 20 May 2017, 02:34:45 UTC
1 parent 1763f7d
kvstore_compaction.go
// 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 dbCompactionTotalDurations.Observe(float64(time.Since(totalStart) / time.Millisecond))
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)
}
}
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
}
}
}
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