53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
/*
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Copyright 2013 CoreOS Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"time"
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)
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// basic conf.
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// TODO: find a good policy to do snapshot
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type snapshotConf struct {
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// Etcd will check if snapshot is need every checkingInterval
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checkingInterval time.Duration
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// The number of writes when the last snapshot happened
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lastWrites uint64
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// If the incremental number of writes since the last snapshot
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// exceeds the write Threshold, etcd will do a snapshot
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writesThr uint64
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}
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var snapConf *snapshotConf
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func newSnapshotConf() *snapshotConf {
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// check snapshot every 3 seconds and the threshold is 20K
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return &snapshotConf{time.Second * 3, etcdStore.TotalWrites(), 20 * 1000}
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}
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func monitorSnapshot() {
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for {
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time.Sleep(snapConf.checkingInterval)
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currentWrites := etcdStore.TotalWrites() - snapConf.lastWrites
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if currentWrites > snapConf.writesThr {
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r.TakeSnapshot()
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snapConf.lastWrites = etcdStore.TotalWrites()
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}
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}
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}
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