forked from buraksezer/olric
/
dmap_backup.go
66 lines (59 loc) · 1.89 KB
/
dmap_backup.go
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// Copyright 2018 Burak Sezer
//
// 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 olricdb
import (
"time"
"golang.org/x/sync/errgroup"
)
func (db *OlricDB) putKeyValBackup(hkey uint64, name string, value interface{}, timeout time.Duration) error {
memCount := db.discovery.numMembers()
backupCount := calcMaxBackupCount(db.config.BackupCount, memCount)
backupOwners := db.getBackupPartitionOwners(hkey)
if len(backupOwners) > backupCount {
backupOwners = backupOwners[len(backupOwners)-backupCount:]
}
if len(backupOwners) == 0 {
// There is no backup owner, return nil.
return nil
}
var g errgroup.Group
for _, backup := range backupOwners {
mem := backup
g.Go(func() error {
// TODO: We may need to retry with backoff
err := db.transport.putBackup(mem, name, hkey, value, timeout)
if err != nil {
db.logger.Printf("[ERROR] Failed to put backup hkey: %s on %s", mem, err)
}
return err
})
}
return g.Wait()
}
func (db *OlricDB) deleteKeyValBackup(hkey uint64, name string) error {
backupOwners := db.getBackupPartitionOwners(hkey)
var g errgroup.Group
for _, backup := range backupOwners {
mem := backup
g.Go(func() error {
// TODO: Add retry with backoff
err := db.transport.deleteBackup(mem, hkey, name)
if err != nil {
db.logger.Printf("[ERROR] Failed to delete backup key/value on %s: %s", name, err)
}
return err
})
}
return g.Wait()
}