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90 lines
2.4 KiB
90 lines
2.4 KiB
package storage
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import (
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"fmt"
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"os"
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"time"
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"github.com/chrislusf/seaweedfs/go/glog"
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)
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func (v *Volume) garbageLevel() float64 {
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return float64(v.nm.DeletedSize()) / float64(v.ContentSize())
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}
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func (v *Volume) Compact() error {
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glog.V(3).Infof("Compacting ...")
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//no need to lock for copy on write
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//v.accessLock.Lock()
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//defer v.accessLock.Unlock()
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//glog.V(3).Infof("Got Compaction lock...")
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filePath := v.FileName()
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glog.V(3).Infof("creating copies for volume %d ...", v.Id)
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return v.copyDataAndGenerateIndexFile(filePath+".cpd", filePath+".cpx")
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}
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func (v *Volume) commitCompact() error {
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glog.V(3).Infof("Committing vacuuming...")
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v.accessLock.Lock()
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defer v.accessLock.Unlock()
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glog.V(3).Infof("Got Committing lock...")
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_ = v.dataFile.Close()
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var e error
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if e = os.Rename(v.FileName()+".cpd", v.FileName()+".dat"); e != nil {
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return e
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}
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if e = os.Rename(v.FileName()+".cpx", v.FileName()+".idx"); e != nil {
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return e
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}
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//glog.V(3).Infof("Pretending to be vacuuming...")
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//time.Sleep(20 * time.Second)
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if e = v.load(true, false, v.needleMapKind); e != nil {
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return e
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}
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return nil
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}
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func (v *Volume) copyDataAndGenerateIndexFile(dstName, idxName string) (err error) {
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var (
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dst, idx *os.File
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)
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if dst, err = os.OpenFile(dstName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644); err != nil {
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return
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}
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defer dst.Close()
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if idx, err = os.OpenFile(idxName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644); err != nil {
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return
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}
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defer idx.Close()
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nm := NewNeedleMap(idx)
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new_offset := int64(SuperBlockSize)
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now := uint64(time.Now().Unix())
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err = ScanVolumeFile(v.dir, v.Collection, v.Id, v.needleMapKind,
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func(superBlock SuperBlock) error {
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_, err = dst.Write(superBlock.Bytes())
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return err
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}, true, func(n *Needle, offset int64) error {
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if n.HasTtl() && now >= n.LastModified+uint64(v.Ttl.Minutes()*60) {
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return nil
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}
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nv, ok := v.nm.Get(n.Id)
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glog.V(4).Infoln("needle expected offset ", offset, "ok", ok, "nv", nv)
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if ok && int64(nv.Offset)*NeedlePaddingSize == offset && nv.Size > 0 {
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if err = nm.Put(n.Id, uint32(new_offset/NeedlePaddingSize), n.Size); err != nil {
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return fmt.Errorf("cannot put needle: %s", err)
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}
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if _, err = n.Append(dst, v.Version()); err != nil {
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return fmt.Errorf("cannot append needle: %s", err)
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}
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new_offset += n.DiskSize()
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glog.V(3).Infoln("saving key", n.Id, "volume offset", offset, "=>", new_offset, "data_size", n.Size)
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}
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return nil
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})
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return
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}
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