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