package storage import ( "fmt" "os" "path" "sync" "time" "github.com/chrislusf/seaweedfs/weed/glog" ) type Volume struct { Id VolumeId dir string Collection string dataFile *os.File nm NeedleMapper needleMapKind NeedleMapType readOnly bool SuperBlock dataFileAccessLock sync.Mutex lastModifiedTime uint64 //unix time in seconds lastCompactIndexOffset uint64 lastCompactRevision uint16 } func NewVolume(dirname string, collection string, id VolumeId, needleMapKind NeedleMapType, replicaPlacement *ReplicaPlacement, ttl *TTL, preallocate int64) (v *Volume, e error) { // if replicaPlacement is nil, the superblock will be loaded from disk v = &Volume{dir: dirname, Collection: collection, Id: id} v.SuperBlock = SuperBlock{ReplicaPlacement: replicaPlacement, Ttl: ttl} v.needleMapKind = needleMapKind e = v.load(true, true, needleMapKind, preallocate) return } func (v *Volume) String() string { return fmt.Sprintf("Id:%v, dir:%s, Collection:%s, dataFile:%v, nm:%v, readOnly:%v", v.Id, v.dir, v.Collection, v.dataFile, v.nm, v.readOnly) } func (v *Volume) FileName() (fileName string) { if v.Collection == "" { fileName = path.Join(v.dir, v.Id.String()) } else { fileName = path.Join(v.dir, v.Collection+"_"+v.Id.String()) } return } func (v *Volume) DataFile() *os.File { return v.dataFile } func (v *Volume) Version() Version { return v.SuperBlock.Version() } func (v *Volume) Size() int64 { stat, e := v.dataFile.Stat() if e == nil { return stat.Size() } glog.V(0).Infof("Failed to read file size %s %v", v.dataFile.Name(), e) return 0 // -1 causes integer overflow and the volume to become unwritable. } // Close cleanly shuts down this volume func (v *Volume) Close() { v.dataFileAccessLock.Lock() defer v.dataFileAccessLock.Unlock() v.nm.Close() _ = v.dataFile.Close() } func (v *Volume) NeedToReplicate() bool { return v.ReplicaPlacement.GetCopyCount() > 1 } func (v *Volume) ContentSize() uint64 { return v.nm.ContentSize() } // volume is expired if modified time + volume ttl < now // except when volume is empty // or when the volume does not have a ttl // or when volumeSizeLimit is 0 when server just starts func (v *Volume) expired(volumeSizeLimit uint64) bool { if volumeSizeLimit == 0 { //skip if we don't know size limit return false } if v.ContentSize() == 0 { return false } if v.Ttl == nil || v.Ttl.Minutes() == 0 { return false } glog.V(1).Infof("now:%v lastModified:%v", time.Now().Unix(), v.lastModifiedTime) livedMinutes := (time.Now().Unix() - int64(v.lastModifiedTime)) / 60 glog.V(1).Infof("ttl:%v lived:%v", v.Ttl, livedMinutes) if int64(v.Ttl.Minutes()) < livedMinutes { return true } return false } // wait either maxDelayMinutes or 10% of ttl minutes func (v *Volume) exiredLongEnough(maxDelayMinutes uint32) bool { if v.Ttl == nil || v.Ttl.Minutes() == 0 { return false } removalDelay := v.Ttl.Minutes() / 10 if removalDelay > maxDelayMinutes { removalDelay = maxDelayMinutes } if uint64(v.Ttl.Minutes()+removalDelay)*60+v.lastModifiedTime < uint64(time.Now().Unix()) { return true } return false }