mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-08-31 06:00:38 +02:00
233 lines
5.1 KiB
Go
233 lines
5.1 KiB
Go
package storage
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import (
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"io/ioutil"
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"os"
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"strings"
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"sync"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
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"github.com/chrislusf/seaweedfs/weed/storage/needle"
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)
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type DiskLocation struct {
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Directory string
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MaxVolumeCount int
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volumes map[needle.VolumeId]*Volume
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sync.RWMutex
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// erasure coding
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ecVolumes map[needle.VolumeId]*erasure_coding.EcVolume
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ecVolumesLock sync.RWMutex
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}
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func NewDiskLocation(dir string, maxVolumeCount int) *DiskLocation {
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location := &DiskLocation{Directory: dir, MaxVolumeCount: maxVolumeCount}
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location.volumes = make(map[needle.VolumeId]*Volume)
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location.ecVolumes = make(map[needle.VolumeId]*erasure_coding.EcVolume)
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return location
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}
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func (l *DiskLocation) volumeIdFromPath(dir os.FileInfo) (needle.VolumeId, string, error) {
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name := dir.Name()
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if !dir.IsDir() && strings.HasSuffix(name, ".dat") {
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base := name[:len(name)-len(".dat")]
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collection, volumeId, err := parseCollectionVolumeId(base)
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return volumeId, collection, err
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}
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return 0, "", fmt.Errorf("Path is not a volume: %s", name)
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}
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func parseCollectionVolumeId(base string) (collection string, vid needle.VolumeId, err error) {
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i := strings.LastIndex(base, "_")
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if i > 0 {
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collection, base = base[0:i], base[i+1:]
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}
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vol, err := needle.NewVolumeId(base)
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return collection, vol, err
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}
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func (l *DiskLocation) loadExistingVolume(fileInfo os.FileInfo, needleMapKind NeedleMapType) {
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name := fileInfo.Name()
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if !fileInfo.IsDir() && strings.HasSuffix(name, ".dat") {
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vid, collection, err := l.volumeIdFromPath(fileInfo)
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if err == nil {
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l.RLock()
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_, found := l.volumes[vid]
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l.RUnlock()
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if !found {
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if v, e := NewVolume(l.Directory, collection, vid, needleMapKind, nil, nil, 0); e == nil {
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l.Lock()
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l.volumes[vid] = v
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l.Unlock()
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size, _, _ := v.FileStat()
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glog.V(0).Infof("data file %s, replicaPlacement=%s v=%d size=%d ttl=%s",
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l.Directory+"/"+name, v.ReplicaPlacement, v.Version(), size, v.Ttl.String())
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// println("volume", vid, "last append at", v.lastAppendAtNs)
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} else {
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glog.V(0).Infof("new volume %s error %s", name, e)
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}
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}
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}
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}
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}
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func (l *DiskLocation) concurrentLoadingVolumes(needleMapKind NeedleMapType, concurrency int) {
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task_queue := make(chan os.FileInfo, 10*concurrency)
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go func() {
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if dirs, err := ioutil.ReadDir(l.Directory); err == nil {
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for _, dir := range dirs {
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task_queue <- dir
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}
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}
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close(task_queue)
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}()
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var wg sync.WaitGroup
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for workerNum := 0; workerNum < concurrency; workerNum++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for dir := range task_queue {
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l.loadExistingVolume(dir, needleMapKind)
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}
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}()
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}
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wg.Wait()
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}
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func (l *DiskLocation) loadExistingVolumes(needleMapKind NeedleMapType) {
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l.concurrentLoadingVolumes(needleMapKind, 10)
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glog.V(0).Infof("Store started on dir: %s with %d volumes max %d", l.Directory, len(l.volumes), l.MaxVolumeCount)
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l.loadAllEcShards()
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glog.V(0).Infof("Store started on dir: %s with %d ec shards", l.Directory, len(l.ecVolumes))
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}
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func (l *DiskLocation) DeleteCollectionFromDiskLocation(collection string) (e error) {
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l.Lock()
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for k, v := range l.volumes {
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if v.Collection == collection {
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e = l.deleteVolumeById(k)
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if e != nil {
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l.Unlock()
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return
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}
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}
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}
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l.Unlock()
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l.ecVolumesLock.Lock()
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for k, v := range l.ecVolumes {
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if v.Collection == collection {
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e = l.deleteEcVolumeById(k)
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if e != nil {
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l.ecVolumesLock.Unlock()
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return
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}
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}
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}
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l.ecVolumesLock.Unlock()
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return
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}
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func (l *DiskLocation) deleteVolumeById(vid needle.VolumeId) (e error) {
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v, ok := l.volumes[vid]
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if !ok {
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return
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}
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e = v.Destroy()
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if e != nil {
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return
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}
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delete(l.volumes, vid)
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return
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}
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func (l *DiskLocation) LoadVolume(vid needle.VolumeId, needleMapKind NeedleMapType) bool {
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if fileInfos, err := ioutil.ReadDir(l.Directory); err == nil {
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for _, fileInfo := range fileInfos {
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volId, _, err := l.volumeIdFromPath(fileInfo)
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if vid == volId && err == nil {
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l.loadExistingVolume(fileInfo, needleMapKind)
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return true
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}
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}
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}
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return false
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}
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func (l *DiskLocation) DeleteVolume(vid needle.VolumeId) error {
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l.Lock()
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defer l.Unlock()
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_, ok := l.volumes[vid]
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if !ok {
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return fmt.Errorf("Volume not found, VolumeId: %d", vid)
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}
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return l.deleteVolumeById(vid)
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}
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func (l *DiskLocation) UnloadVolume(vid needle.VolumeId) error {
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l.Lock()
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defer l.Unlock()
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v, ok := l.volumes[vid]
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if !ok {
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return fmt.Errorf("Volume not loaded, VolumeId: %d", vid)
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}
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v.Close()
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delete(l.volumes, vid)
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return nil
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}
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func (l *DiskLocation) SetVolume(vid needle.VolumeId, volume *Volume) {
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l.Lock()
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defer l.Unlock()
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l.volumes[vid] = volume
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}
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func (l *DiskLocation) FindVolume(vid needle.VolumeId) (*Volume, bool) {
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l.RLock()
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defer l.RUnlock()
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v, ok := l.volumes[vid]
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return v, ok
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}
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func (l *DiskLocation) VolumesLen() int {
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l.RLock()
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defer l.RUnlock()
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return len(l.volumes)
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}
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func (l *DiskLocation) Close() {
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l.Lock()
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for _, v := range l.volumes {
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v.Close()
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}
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l.Unlock()
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l.ecVolumesLock.Lock()
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for _, ecVolume := range l.ecVolumes {
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ecVolume.Close()
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}
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l.ecVolumesLock.Unlock()
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return
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}
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