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package storage
import ( "code.google.com/p/weed-fs/go/glog" "fmt" "os" _ "time" )
func (v *Volume) garbageLevel() float64 { return float64(v.nm.DeletedSize()) / float64(v.ContentSize()) }
func (v *Volume) Compact() error { glog.V(3).Infof("Compacting ...") v.accessLock.Lock() defer v.accessLock.Unlock() glog.V(3).Infof("Got Compaction lock...")
filePath := v.FileName() glog.V(3).Infof("creating copies for volume %d ...", v.Id) return v.copyDataAndGenerateIndexFile(filePath+".cpd", filePath+".cpx") } func (v *Volume) commitCompact() error { glog.V(3).Infof("Committing vacuuming...") v.accessLock.Lock() defer v.accessLock.Unlock() glog.V(3).Infof("Got Committing lock...") _ = v.dataFile.Close() var e error if e = os.Rename(v.FileName()+".cpd", v.FileName()+".dat"); e != nil { return e } if e = os.Rename(v.FileName()+".cpx", v.FileName()+".idx"); e != nil { return e } //glog.V(3).Infof("Pretending to be vacuuming...")
//time.Sleep(20 * time.Second)
if e = v.load(true, false); e != nil { return e } return nil }
func (v *Volume) copyDataAndGenerateIndexFile(dstName, idxName string) (err error) { var ( dst, idx *os.File ) if dst, err = os.OpenFile(dstName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644); err != nil { return } defer dst.Close()
if idx, err = os.OpenFile(idxName, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644); err != nil { return } defer idx.Close()
nm := NewNeedleMap(idx) new_offset := int64(SuperBlockSize)
err = ScanVolumeFile(v.dir, v.Collection, v.Id, func(superBlock SuperBlock) error { _, err = dst.Write(superBlock.Bytes()) return err }, true, func(n *Needle, offset int64) error { nv, ok := v.nm.Get(n.Id) glog.V(4).Infoln("needle expected offset ", offset, "ok", ok, "nv", nv) if ok && int64(nv.Offset)*NeedlePaddingSize == offset && nv.Size > 0 { if _, err = nm.Put(n.Id, uint32(new_offset/NeedlePaddingSize), n.Size); err != nil { return fmt.Errorf("cannot put needle: %s", err) } if _, err = n.Append(dst, v.Version()); err != nil { return fmt.Errorf("cannot append needle: %s", err) } new_offset += n.DiskSize() glog.V(3).Infoln("saving key", n.Id, "volume offset", offset, "=>", new_offset, "data_size", n.Size) } return nil })
return }
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