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368 lines
10 KiB
368 lines
10 KiB
package storage
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import (
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"fmt"
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"path"
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"strconv"
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"sync"
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"time"
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"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/volume_server_pb"
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"github.com/seaweedfs/seaweedfs/weed/stats"
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"github.com/seaweedfs/seaweedfs/weed/storage/backend"
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"github.com/seaweedfs/seaweedfs/weed/storage/needle"
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"github.com/seaweedfs/seaweedfs/weed/storage/super_block"
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"github.com/seaweedfs/seaweedfs/weed/storage/types"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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)
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type Volume struct {
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Id needle.VolumeId
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dir string
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dirIdx string
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Collection string
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DataBackend backend.BackendStorageFile
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nm NeedleMapper
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tmpNm TempNeedleMapper
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needleMapKind NeedleMapKind
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noWriteOrDelete bool // if readonly, either noWriteOrDelete or noWriteCanDelete
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noWriteCanDelete bool // if readonly, either noWriteOrDelete or noWriteCanDelete
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noWriteLock sync.RWMutex
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hasRemoteFile bool // if the volume has a remote file
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MemoryMapMaxSizeMb uint32
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super_block.SuperBlock
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dataFileAccessLock sync.RWMutex
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superBlockAccessLock sync.Mutex
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asyncRequestsChan chan *needle.AsyncRequest
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lastModifiedTsSeconds uint64 // unix time in seconds
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lastAppendAtNs uint64 // unix time in nanoseconds
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lastCompactIndexOffset uint64
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lastCompactRevision uint16
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ldbTimeout int64
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isCompacting bool
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isCommitCompacting bool
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volumeInfoRWLock sync.RWMutex
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volumeInfo *volume_server_pb.VolumeInfo
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location *DiskLocation
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lastIoError error
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}
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func NewVolume(dirname string, dirIdx string, collection string, id needle.VolumeId, needleMapKind NeedleMapKind, replicaPlacement *super_block.ReplicaPlacement, ttl *needle.TTL, preallocate int64, memoryMapMaxSizeMb uint32, ldbTimeout int64) (v *Volume, e error) {
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// if replicaPlacement is nil, the superblock will be loaded from disk
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v = &Volume{dir: dirname, dirIdx: dirIdx, Collection: collection, Id: id, MemoryMapMaxSizeMb: memoryMapMaxSizeMb,
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asyncRequestsChan: make(chan *needle.AsyncRequest, 128)}
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v.SuperBlock = super_block.SuperBlock{ReplicaPlacement: replicaPlacement, Ttl: ttl}
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v.needleMapKind = needleMapKind
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v.ldbTimeout = ldbTimeout
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e = v.load(true, true, needleMapKind, preallocate)
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v.startWorker()
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return
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}
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func (v *Volume) String() string {
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v.noWriteLock.RLock()
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defer v.noWriteLock.RUnlock()
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return fmt.Sprintf("Id:%v dir:%s dirIdx:%s Collection:%s dataFile:%v nm:%v noWrite:%v canDelete:%v", v.Id, v.dir, v.dirIdx, v.Collection, v.DataBackend, v.nm, v.noWriteOrDelete || v.noWriteCanDelete, v.noWriteCanDelete)
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}
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func VolumeFileName(dir string, collection string, id int) (fileName string) {
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idString := strconv.Itoa(id)
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if collection == "" {
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fileName = path.Join(dir, idString)
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} else {
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fileName = path.Join(dir, collection+"_"+idString)
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}
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return
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}
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func (v *Volume) DataFileName() (fileName string) {
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return VolumeFileName(v.dir, v.Collection, int(v.Id))
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}
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func (v *Volume) IndexFileName() (fileName string) {
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return VolumeFileName(v.dirIdx, v.Collection, int(v.Id))
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}
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func (v *Volume) FileName(ext string) (fileName string) {
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switch ext {
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case ".idx", ".cpx", ".ldb", ".cpldb":
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return VolumeFileName(v.dirIdx, v.Collection, int(v.Id)) + ext
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}
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// .dat, .cpd, .vif
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return VolumeFileName(v.dir, v.Collection, int(v.Id)) + ext
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}
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func (v *Volume) Version() needle.Version {
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v.superBlockAccessLock.Lock()
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defer v.superBlockAccessLock.Unlock()
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if v.volumeInfo.Version != 0 {
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v.SuperBlock.Version = needle.Version(v.volumeInfo.Version)
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}
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return v.SuperBlock.Version
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}
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func (v *Volume) FileStat() (datSize uint64, idxSize uint64, modTime time.Time) {
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v.dataFileAccessLock.RLock()
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defer v.dataFileAccessLock.RUnlock()
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if v.DataBackend == nil {
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return
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}
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datFileSize, modTime, e := v.DataBackend.GetStat()
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if e == nil {
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return uint64(datFileSize), v.nm.IndexFileSize(), modTime
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}
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glog.V(0).Infof("Failed to read file size %s %v", v.DataBackend.Name(), e)
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return // -1 causes integer overflow and the volume to become unwritable.
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}
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func (v *Volume) ContentSize() uint64 {
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v.dataFileAccessLock.RLock()
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defer v.dataFileAccessLock.RUnlock()
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if v.nm == nil {
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return 0
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}
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return v.nm.ContentSize()
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}
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func (v *Volume) doIsEmpty() (bool, error) {
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// check v.DataBackend.GetStat()
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if v.DataBackend == nil {
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return false, fmt.Errorf("v.DataBackend is nil")
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} else {
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datFileSize, _, e := v.DataBackend.GetStat()
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if e != nil {
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glog.V(0).Infof("Failed to read file size %s %v", v.DataBackend.Name(), e)
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return false, fmt.Errorf("v.DataBackend.GetStat(): %v", e)
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}
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if datFileSize > super_block.SuperBlockSize {
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return false, nil
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}
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}
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// check v.nm.ContentSize()
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if v.nm != nil {
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if v.nm.ContentSize() > 0 {
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return false, nil
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}
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}
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return true, nil
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}
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func (v *Volume) DeletedSize() uint64 {
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v.dataFileAccessLock.RLock()
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defer v.dataFileAccessLock.RUnlock()
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if v.nm == nil {
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return 0
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}
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return v.nm.DeletedSize()
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}
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func (v *Volume) FileCount() uint64 {
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v.dataFileAccessLock.RLock()
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defer v.dataFileAccessLock.RUnlock()
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if v.nm == nil {
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return 0
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}
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return uint64(v.nm.FileCount())
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}
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func (v *Volume) DeletedCount() uint64 {
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v.dataFileAccessLock.RLock()
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defer v.dataFileAccessLock.RUnlock()
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if v.nm == nil {
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return 0
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}
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return uint64(v.nm.DeletedCount())
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}
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func (v *Volume) MaxFileKey() types.NeedleId {
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v.dataFileAccessLock.RLock()
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defer v.dataFileAccessLock.RUnlock()
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if v.nm == nil {
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return 0
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}
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return v.nm.MaxFileKey()
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}
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func (v *Volume) IndexFileSize() uint64 {
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v.dataFileAccessLock.RLock()
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defer v.dataFileAccessLock.RUnlock()
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if v.nm == nil {
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return 0
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}
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return v.nm.IndexFileSize()
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}
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func (v *Volume) DiskType() types.DiskType {
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return v.location.DiskType
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}
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func (v *Volume) SyncToDisk() {
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v.dataFileAccessLock.Lock()
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defer v.dataFileAccessLock.Unlock()
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if v.nm != nil {
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if err := v.nm.Sync(); err != nil {
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glog.Warningf("Volume Close fail to sync volume idx %d", v.Id)
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}
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}
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if v.DataBackend != nil {
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if err := v.DataBackend.Sync(); err != nil {
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glog.Warningf("Volume Close fail to sync volume %d", v.Id)
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}
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}
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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.doClose()
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}
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func (v *Volume) doClose() {
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for v.isCommitCompacting {
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time.Sleep(521 * time.Millisecond)
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glog.Warningf("Volume Close wait for compaction %d", v.Id)
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}
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if v.nm != nil {
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if err := v.nm.Sync(); err != nil {
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glog.Warningf("Volume Close fail to sync volume idx %d", v.Id)
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}
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v.nm.Close()
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v.nm = nil
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}
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if v.DataBackend != nil {
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if err := v.DataBackend.Close(); err != nil {
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glog.Warningf("Volume Close fail to sync volume %d", v.Id)
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}
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v.DataBackend = nil
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stats.VolumeServerVolumeGauge.WithLabelValues(v.Collection, "volume").Dec()
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}
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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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// 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(contentSize uint64, 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 contentSize <= super_block.SuperBlockSize {
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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(2).Infof("volume %d now:%v lastModified:%v", v.Id, time.Now().Unix(), v.lastModifiedTsSeconds)
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livedMinutes := (time.Now().Unix() - int64(v.lastModifiedTsSeconds)) / 60
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glog.V(2).Infof("volume %d ttl:%v lived:%v", v.Id, 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) expiredLongEnough(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.lastModifiedTsSeconds < 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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func (v *Volume) collectStatus() (maxFileKey types.NeedleId, datFileSize int64, modTime time.Time, fileCount, deletedCount, deletedSize uint64, ok bool) {
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v.dataFileAccessLock.RLock()
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defer v.dataFileAccessLock.RUnlock()
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glog.V(4).Infof("collectStatus volume %d", v.Id)
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if v.nm == nil || v.DataBackend == nil {
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return
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}
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ok = true
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maxFileKey = v.nm.MaxFileKey()
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datFileSize, modTime, _ = v.DataBackend.GetStat()
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fileCount = uint64(v.nm.FileCount())
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deletedCount = uint64(v.nm.DeletedCount())
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deletedSize = v.nm.DeletedSize()
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return
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}
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func (v *Volume) ToVolumeInformationMessage() (types.NeedleId, *master_pb.VolumeInformationMessage) {
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maxFileKey, volumeSize, modTime, fileCount, deletedCount, deletedSize, ok := v.collectStatus()
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if !ok {
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return 0, nil
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}
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volumeInfo := &master_pb.VolumeInformationMessage{
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Id: uint32(v.Id),
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Size: uint64(volumeSize),
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Collection: v.Collection,
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FileCount: fileCount,
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DeleteCount: deletedCount,
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DeletedByteCount: deletedSize,
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ReadOnly: v.IsReadOnly(),
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ReplicaPlacement: uint32(v.ReplicaPlacement.Byte()),
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Version: uint32(v.Version()),
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Ttl: v.Ttl.ToUint32(),
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CompactRevision: uint32(v.SuperBlock.CompactionRevision),
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ModifiedAtSecond: modTime.Unix(),
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DiskType: string(v.location.DiskType),
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}
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volumeInfo.RemoteStorageName, volumeInfo.RemoteStorageKey = v.RemoteStorageNameKey()
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return maxFileKey, volumeInfo
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}
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func (v *Volume) RemoteStorageNameKey() (storageName, storageKey string) {
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if v.volumeInfo == nil {
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return
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}
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if len(v.volumeInfo.GetFiles()) == 0 {
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return
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}
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return v.volumeInfo.GetFiles()[0].BackendName(), v.volumeInfo.GetFiles()[0].GetKey()
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}
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func (v *Volume) IsReadOnly() bool {
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v.noWriteLock.RLock()
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defer v.noWriteLock.RUnlock()
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return v.noWriteOrDelete || v.noWriteCanDelete || v.location.isDiskSpaceLow
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}
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func (v *Volume) PersistReadOnly(readOnly bool) {
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v.volumeInfoRWLock.RLock()
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defer v.volumeInfoRWLock.RUnlock()
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v.volumeInfo.ReadOnly = readOnly
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v.SaveVolumeInfo()
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}
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