37 lines
895 B
Go
37 lines
895 B
Go
package main
|
|
|
|
import (
|
|
"time"
|
|
)
|
|
|
|
// basic conf.
|
|
// TODO: find a good policy to do snapshot
|
|
type snapshotConf struct {
|
|
// Etcd will check if snapshot is need every checkingInterval
|
|
checkingInterval time.Duration
|
|
// The number of writes when the last snapshot happened
|
|
lastWrites uint64
|
|
// If the incremental number of writes since the last snapshot
|
|
// exceeds the write Threshold, etcd will do a snapshot
|
|
writesThr uint64
|
|
}
|
|
|
|
var snapConf *snapshotConf
|
|
|
|
func newSnapshotConf() *snapshotConf {
|
|
// check snapshot every 3 seconds and the threshold is 20K
|
|
return &snapshotConf{time.Second * 3, etcdStore.TotalWrites(), 20 * 1000}
|
|
}
|
|
|
|
func monitorSnapshot() {
|
|
for {
|
|
time.Sleep(snapConf.checkingInterval)
|
|
currentWrites := etcdStore.TotalWrites() - snapConf.lastWrites
|
|
|
|
if currentWrites > snapConf.writesThr {
|
|
r.TakeSnapshot()
|
|
snapConf.lastWrites = etcdStore.TotalWrites()
|
|
}
|
|
}
|
|
}
|