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package storage
import (
"fmt"
"io/ioutil"
"os"
"strings"
"sync"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
)
type DiskLocation struct {
Directory string
MaxVolumeCount int
volumes map[needle.VolumeId]*Volume
volumesLock sync.RWMutex
// erasure coding
ecVolumes map[needle.VolumeId]*erasure_coding.EcVolume
ecVolumesLock sync.RWMutex
}
func NewDiskLocation(dir string, maxVolumeCount int) *DiskLocation {
location := &DiskLocation{Directory: dir, MaxVolumeCount: maxVolumeCount}
location.volumes = make(map[needle.VolumeId]*Volume)
location.ecVolumes = make(map[needle.VolumeId]*erasure_coding.EcVolume)
return location
}
func (l *DiskLocation) volumeIdFromPath(dir os.FileInfo) (needle.VolumeId, string, error) {
name := dir.Name()
if !dir.IsDir() && strings.HasSuffix(name, ".idx") {
base := name[:len(name)-len(".idx")]
collection, volumeId, err := parseCollectionVolumeId(base)
return volumeId, collection, err
}
return 0, "", fmt.Errorf("Path is not a volume: %s", name)
}
func parseCollectionVolumeId(base string) (collection string, vid needle.VolumeId, err error) {
i := strings.LastIndex(base, "_")
if i > 0 {
collection, base = base[0:i], base[i+1:]
}
vol, err := needle.NewVolumeId(base)
return collection, vol, err
}
func (l *DiskLocation) loadExistingVolume(fileInfo os.FileInfo, needleMapKind NeedleMapType) bool {
name := fileInfo.Name()
if !fileInfo.IsDir() && strings.HasSuffix(name, ".idx") {
vid, collection, err := l.volumeIdFromPath(fileInfo)
if err != nil {
glog.Warningf("get volume id failed, %s, err : %s", name, err)
return false
}
// void loading one volume more than once
l.volumesLock.RLock()
_, found := l.volumes[vid]
l.volumesLock.RUnlock()
if found {
glog.V(1).Infof("loaded volume, %v", vid)
return true
}
v, e := NewVolume(l.Directory, collection, vid, needleMapKind, nil, nil, 0, 0)
if e != nil {
glog.V(0).Infof("new volume %s error %s", name, e)
return false
}
l.volumesLock.Lock()
l.volumes[vid] = v
l.volumesLock.Unlock()
size, _, _ := v.FileStat()
glog.V(0).Infof("data file %s, replicaPlacement=%s v=%d size=%d ttl=%s",
l.Directory+"/"+name, v.ReplicaPlacement, v.Version(), size, v.Ttl.String())
return true
}
return false
}
func (l *DiskLocation) concurrentLoadingVolumes(needleMapKind NeedleMapType, concurrency int) {
task_queue := make(chan os.FileInfo, 10*concurrency)
go func() {
if dirs, err := ioutil.ReadDir(l.Directory); err == nil {
for _, dir := range dirs {
task_queue <- dir
}
}
close(task_queue)
}()
var wg sync.WaitGroup
for workerNum := 0; workerNum < concurrency; workerNum++ {
wg.Add(1)
go func() {
defer wg.Done()
for dir := range task_queue {
_ = l.loadExistingVolume(dir, needleMapKind)
}
}()
}
wg.Wait()
}
func (l *DiskLocation) loadExistingVolumes(needleMapKind NeedleMapType) {
l.concurrentLoadingVolumes(needleMapKind, 10)
glog.V(0).Infof("Store started on dir: %s with %d volumes max %d", l.Directory, len(l.volumes), l.MaxVolumeCount)
l.loadAllEcShards()
glog.V(0).Infof("Store started on dir: %s with %d ec shards", l.Directory, len(l.ecVolumes))
}
func (l *DiskLocation) DeleteCollectionFromDiskLocation(collection string) (e error) {
l.volumesLock.Lock()
delVolsMap := l.unmountVolumeByCollection(collection)
l.volumesLock.Unlock()
l.ecVolumesLock.Lock()
delEcVolsMap := l.unmountEcVolumeByCollection(collection)
l.ecVolumesLock.Unlock()
errChain := make(chan error, 2)
var wg sync.WaitGroup
wg.Add(2)
go func() {
for _, v := range delVolsMap {
if err := v.Destroy(); err != nil {
errChain <- err
}
}
wg.Done()
}()
go func() {
for _, v := range delEcVolsMap {
v.Destroy()
}
wg.Done()
}()
go func() {
wg.Wait()
close(errChain)
}()
errBuilder := strings.Builder{}
for err := range errChain {
errBuilder.WriteString(err.Error())
errBuilder.WriteString("; ")
}
if errBuilder.Len() > 0 {
e = fmt.Errorf(errBuilder.String())
}
return
}
func (l *DiskLocation) deleteVolumeById(vid needle.VolumeId) (e error) {
v, ok := l.volumes[vid]
if !ok {
return
}
e = v.Destroy()
if e != nil {
return
}
delete(l.volumes, vid)
return
}
func (l *DiskLocation) LoadVolume(vid needle.VolumeId, needleMapKind NeedleMapType) bool {
if fileInfo, found := l.LocateVolume(vid); found {
return l.loadExistingVolume(fileInfo, needleMapKind)
}
return false
}
func (l *DiskLocation) DeleteVolume(vid needle.VolumeId) error {
l.volumesLock.Lock()
defer l.volumesLock.Unlock()
_, ok := l.volumes[vid]
if !ok {
return fmt.Errorf("Volume not found, VolumeId: %d", vid)
}
return l.deleteVolumeById(vid)
}
func (l *DiskLocation) UnloadVolume(vid needle.VolumeId) error {
l.volumesLock.Lock()
defer l.volumesLock.Unlock()
v, ok := l.volumes[vid]
if !ok {
return fmt.Errorf("Volume not loaded, VolumeId: %d", vid)
}
v.Close()
delete(l.volumes, vid)
return nil
}
func (l *DiskLocation) unmountVolumeByCollection(collectionName string) map[needle.VolumeId]*Volume {
deltaVols := make(map[needle.VolumeId]*Volume, 0)
for k, v := range l.volumes {
if v.Collection == collectionName && !v.isCompacting {
deltaVols[k] = v
}
}
for k := range deltaVols {
delete(l.volumes, k)
}
return deltaVols
}
func (l *DiskLocation) SetVolume(vid needle.VolumeId, volume *Volume) {
l.volumesLock.Lock()
defer l.volumesLock.Unlock()
l.volumes[vid] = volume
}
func (l *DiskLocation) FindVolume(vid needle.VolumeId) (*Volume, bool) {
l.volumesLock.RLock()
defer l.volumesLock.RUnlock()
v, ok := l.volumes[vid]
return v, ok
}
func (l *DiskLocation) VolumesLen() int {
l.volumesLock.RLock()
defer l.volumesLock.RUnlock()
return len(l.volumes)
}
func (l *DiskLocation) Close() {
l.volumesLock.Lock()
for _, v := range l.volumes {
v.Close()
}
l.volumesLock.Unlock()
l.ecVolumesLock.Lock()
for _, ecVolume := range l.ecVolumes {
ecVolume.Close()
}
l.ecVolumesLock.Unlock()
return
}
func (l *DiskLocation) LocateVolume(vid needle.VolumeId) (os.FileInfo, bool) {
if fileInfos, err := ioutil.ReadDir(l.Directory); err == nil {
for _, fileInfo := range fileInfos {
volId, _, err := l.volumeIdFromPath(fileInfo)
if vid == volId && err == nil {
return fileInfo, true
}
}
}
return nil, false
}
|
