/
janitor.go
85 lines (78 loc) · 2.28 KB
/
janitor.go
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// Copyright 2018-2021 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 dmap
import (
"time"
"github.com/buraksezer/olric/internal/cluster/partitions"
)
func wipeOutFragment(part *partitions.Partition, name string, f *fragment) error {
// Stop background services if there is any.
err := f.Close()
if err != nil {
return err
}
// Destroy data on-disk or in-memory.
err = f.Destroy()
if err != nil {
return err
}
// Delete the fragment from partition.
part.Map().Delete(name)
return nil
}
func (s *Service) deleteEmptyFragments() {
janitor := func(part *partitions.Partition) {
part.Map().Range(func(name, tmp interface{}) bool {
f := tmp.(*fragment)
f.Lock()
defer f.Unlock()
if f.storage.Stats().Length != 0 {
// Continue scanning.
return true
}
err := wipeOutFragment(part, name.(string), f)
if err != nil {
s.log.V(3).Printf("[ERROR] Failed to delete empty DMap fragment (kind: %s): %s on PartID: %d",
part.Kind(), name, part.ID())
// continue scanning
return true
}
s.log.V(4).Printf("[INFO] Empty DMap fragment (kind: %s) has been deleted: %s on PartID: %d",
part.Kind(), name, part.ID())
return true
})
}
for partID := uint64(0); partID < s.config.PartitionCount; partID++ {
// Clean stale DMap fragments on partition table
part := s.primary.PartitionByID(partID)
janitor(part)
// Clean stale DMap fragments on backup partition table
backup := s.backup.PartitionByID(partID)
janitor(backup)
}
}
func (s *Service) janitor() {
defer s.wg.Done()
timer := time.NewTimer(s.config.DMaps.CheckEmptyFragmentsInterval)
defer timer.Stop()
for {
timer.Reset(s.config.DMaps.CheckEmptyFragmentsInterval)
select {
case <-timer.C:
s.deleteEmptyFragments()
case <-s.ctx.Done():
return
}
}
}