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https://github.com/seaweedfs/seaweedfs.git
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Revert "Merge pull request #1299 from song-zhang/master"
This reverts commit9016fa19ba
, reversing changes made to47234760f4
.
This commit is contained in:
parent
9016fa19ba
commit
afb6a1dbb4
@ -1,55 +0,0 @@
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package needle
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type AsyncRequest struct {
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N *Needle
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IsWriteRequest bool
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ActualSize int64
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Fsync bool
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offset uint64
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size uint64
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doneChan chan interface{}
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isUnchanged bool
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err error
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}
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func NewAsyncRequest(n *Needle, isWriteRequest bool, fsync bool) *AsyncRequest {
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return &AsyncRequest{
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offset: 0,
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size: 0,
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ActualSize: 0,
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doneChan: make(chan interface{}),
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N: n,
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isUnchanged: false,
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IsWriteRequest: isWriteRequest,
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Fsync: fsync,
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err: nil,
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}
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}
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func (r *AsyncRequest) WaitComplete() (uint64, uint64, bool, error) {
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<-r.doneChan
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return r.offset, r.size, r.isUnchanged, r.err
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}
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func (r *AsyncRequest) Complete(offset uint64, size uint64, isUnchanged bool, err error) {
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r.offset = offset
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r.size = size
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r.isUnchanged = isUnchanged
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r.err = err
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close(r.doneChan)
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}
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func (r *AsyncRequest) UpdateResult(offset uint64, size uint64, isUnchanged bool, err error) {
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r.offset = offset
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r.size = size
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r.isUnchanged = isUnchanged
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r.err = err
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}
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func (r *AsyncRequest) Submit() {
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close(r.doneChan)
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}
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func (r *AsyncRequest) IsSucceed() bool {
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return r.err == nil
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}
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@ -264,7 +264,12 @@ func (s *Store) WriteVolumeNeedle(i needle.VolumeId, n *needle.Needle, fsync boo
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err = fmt.Errorf("volume %d is read only", i)
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return
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}
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_, _, isUnchanged, err = v.writeNeedle2(n, fsync)
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// using len(n.Data) here instead of n.Size before n.Size is populated in v.writeNeedle(n)
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if MaxPossibleVolumeSize >= v.ContentSize()+uint64(needle.GetActualSize(uint32(len(n.Data)), v.Version())) {
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_, _, isUnchanged, err = v.writeNeedle(n, fsync)
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} else {
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err = fmt.Errorf("volume size limit %d exceeded! current size is %d", s.GetVolumeSizeLimit(), v.ContentSize())
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}
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return
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}
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glog.V(0).Infoln("volume", i, "not found!")
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@ -277,7 +282,11 @@ func (s *Store) DeleteVolumeNeedle(i needle.VolumeId, n *needle.Needle) (uint32,
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if v.noWriteOrDelete {
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return 0, fmt.Errorf("volume %d is read only", i)
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}
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return v.deleteNeedle2(n)
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if MaxPossibleVolumeSize >= v.ContentSize()+uint64(needle.GetActualSize(0, v.Version())) {
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return v.deleteNeedle(n)
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} else {
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return 0, fmt.Errorf("volume size limit %d exceeded! current size is %d", s.GetVolumeSizeLimit(), v.ContentSize())
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}
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}
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return 0, fmt.Errorf("volume %d not found on %s:%d", i, s.Ip, s.Port)
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}
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@ -33,7 +33,6 @@ type Volume struct {
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super_block.SuperBlock
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dataFileAccessLock sync.RWMutex
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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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@ -47,15 +46,12 @@ type Volume struct {
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func NewVolume(dirname string, collection string, id needle.VolumeId, needleMapKind NeedleMapType, replicaPlacement *super_block.ReplicaPlacement, ttl *needle.TTL, preallocate int64, memoryMapMaxSizeMb uint32) (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, Collection: collection, Id: id, MemoryMapMaxSizeMb: memoryMapMaxSizeMb,
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asyncRequestsChan: make(chan *needle.AsyncRequest, 128)}
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v = &Volume{dir: dirname, Collection: collection, Id: id, MemoryMapMaxSizeMb: memoryMapMaxSizeMb}
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v.SuperBlock = super_block.SuperBlock{ReplicaPlacement: replicaPlacement, Ttl: ttl}
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v.needleMapKind = needleMapKind
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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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return fmt.Sprintf("Id:%v, dir:%s, Collection:%s, dataFile:%v, nm:%v, noWrite:%v canDelete:%v", v.Id, v.dir, v.Collection, v.DataBackend, v.nm, v.noWriteOrDelete || v.noWriteCanDelete, v.noWriteCanDelete)
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}
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@ -69,7 +65,6 @@ func VolumeFileName(dir string, collection string, id int) (fileName string) {
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}
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return
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}
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func (v *Volume) FileName() (fileName string) {
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return VolumeFileName(v.dir, v.Collection, int(v.Id))
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}
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@ -46,7 +46,6 @@ func (v *Volume) Destroy() (err error) {
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err = fmt.Errorf("volume %d is compacting", v.Id)
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return
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}
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close(v.asyncRequestsChan)
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storageName, storageKey := v.RemoteStorageNameKey()
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if v.HasRemoteFile() && storageName != "" && storageKey != "" {
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if backendStorage, found := backend.BackendStorages[storageName]; found {
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@ -64,11 +63,7 @@ func (v *Volume) Destroy() (err error) {
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return
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}
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func (v *Volume) asyncRequestAppend(request *needle.AsyncRequest) {
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v.asyncRequestsChan <- request
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}
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func (v *Volume) writeNeedleDeprecated(n *needle.Needle, fsync bool) (offset uint64, size uint32, isUnchanged bool, err error) {
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func (v *Volume) writeNeedle(n *needle.Needle, fsync bool) (offset uint64, size uint32, isUnchanged bool, err error) {
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// glog.V(4).Infof("writing needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
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v.dataFileAccessLock.Lock()
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defer v.dataFileAccessLock.Unlock()
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@ -122,66 +117,7 @@ func (v *Volume) writeNeedleDeprecated(n *needle.Needle, fsync bool) (offset uin
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return
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}
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func (v *Volume) writeNeedle2(n *needle.Needle, fsync bool) (offset uint64, size uint32, isUnchanged bool, err error) {
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// glog.V(4).Infof("writing needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
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if n.Ttl == needle.EMPTY_TTL && v.Ttl != needle.EMPTY_TTL {
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n.SetHasTtl()
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n.Ttl = v.Ttl
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}
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asyncRequest := needle.NewAsyncRequest(n, true, fsync)
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// using len(n.Data) here instead of n.Size before n.Size is populated in n.Append()
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asyncRequest.ActualSize = needle.GetActualSize(uint32(len(n.Data)), v.Version())
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v.asyncRequestAppend(asyncRequest)
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offset, _, isUnchanged, err = asyncRequest.WaitComplete()
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return
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}
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func (v *Volume) doWriteRequest(n *needle.Needle) (offset uint64, size uint32, isUnchanged bool, err error) {
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// glog.V(4).Infof("writing needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
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if v.isFileUnchanged(n) {
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size = n.DataSize
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isUnchanged = true
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return
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}
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// check whether existing needle cookie matches
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nv, ok := v.nm.Get(n.Id)
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if ok {
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existingNeedle, _, _, existingNeedleReadErr := needle.ReadNeedleHeader(v.DataBackend, v.Version(), nv.Offset.ToAcutalOffset())
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if existingNeedleReadErr != nil {
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err = fmt.Errorf("reading existing needle: %v", existingNeedleReadErr)
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return
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}
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if existingNeedle.Cookie != n.Cookie {
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glog.V(0).Infof("write cookie mismatch: existing %x, new %x", existingNeedle.Cookie, n.Cookie)
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err = fmt.Errorf("mismatching cookie %x", n.Cookie)
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return
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}
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}
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// append to dat file
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n.AppendAtNs = uint64(time.Now().UnixNano())
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if offset, size, _, err = n.Append(v.DataBackend, v.Version()); err != nil {
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return
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}
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v.lastAppendAtNs = n.AppendAtNs
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// add to needle map
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if !ok || uint64(nv.Offset.ToAcutalOffset()) < offset {
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if err = v.nm.Put(n.Id, ToOffset(int64(offset)), n.Size); err != nil {
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glog.V(4).Infof("failed to save in needle map %d: %v", n.Id, err)
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}
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}
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if v.lastModifiedTsSeconds < n.LastModified {
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v.lastModifiedTsSeconds = n.LastModified
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}
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return
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}
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func (v *Volume) deleteNeedleDeprecated(n *needle.Needle) (uint32, error) {
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func (v *Volume) deleteNeedle(n *needle.Needle) (uint32, error) {
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glog.V(4).Infof("delete needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
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v.dataFileAccessLock.Lock()
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defer v.dataFileAccessLock.Unlock()
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@ -204,37 +140,6 @@ func (v *Volume) deleteNeedleDeprecated(n *needle.Needle) (uint32, error) {
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return 0, nil
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}
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func (v *Volume) deleteNeedle2(n *needle.Needle) (uint32, error) {
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asyncRequest := needle.NewAsyncRequest(n, false, false)
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asyncRequest.ActualSize = needle.GetActualSize(0, v.Version())
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v.asyncRequestAppend(asyncRequest)
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_, size, _, err := asyncRequest.WaitComplete()
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return uint32(size), err
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}
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func (v *Volume) doDeleteRequest(n *needle.Needle) (uint32, error) {
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glog.V(4).Infof("delete needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
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nv, ok := v.nm.Get(n.Id)
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//fmt.Println("key", n.Id, "volume offset", nv.Offset, "data_size", n.Size, "cached size", nv.Size)
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if ok && nv.Size != TombstoneFileSize {
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size := nv.Size
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n.Data = nil
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n.AppendAtNs = uint64(time.Now().UnixNano())
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offset, _, _, err := n.Append(v.DataBackend, v.Version())
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if err != nil {
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return size, err
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}
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v.lastAppendAtNs = n.AppendAtNs
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if err = v.nm.Delete(n.Id, ToOffset(int64(offset))); err != nil {
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return size, err
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}
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return size, err
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}
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return 0, nil
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}
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// read fills in Needle content by looking up n.Id from NeedleMapper
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func (v *Volume) readNeedle(n *needle.Needle) (int, error) {
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v.dataFileAccessLock.RLock()
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@ -271,87 +176,6 @@ func (v *Volume) readNeedle(n *needle.Needle) (int, error) {
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return -1, ErrorNotFound
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}
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func (v *Volume) startWorker() {
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go func() {
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chanClosed := false
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for {
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// chan closed. go thread will exit
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if chanClosed {
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break
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}
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fsync := false
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currentRequests := make([]*needle.AsyncRequest, 0, 128)
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currentBytesToWrite := int64(0)
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for {
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request, ok := <-v.asyncRequestsChan
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//volume may be closed
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if !ok {
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chanClosed = true
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break
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}
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if MaxPossibleVolumeSize < v.ContentSize()+uint64(currentBytesToWrite+request.ActualSize) {
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request.Complete(0, 0, false,
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fmt.Errorf("volume size limit %d exceeded! current size is %d", MaxPossibleVolumeSize, v.ContentSize()))
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break
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}
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currentRequests = append(currentRequests, request)
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currentBytesToWrite += request.ActualSize
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if request.Fsync {
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fsync = true
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}
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// submit at most 4M bytes or 128 requests at one time to decrease request delay.
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// it also need to break if there is no data in channel to avoid io hang.
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if currentBytesToWrite >= 4*1024*1024 || len(currentRequests) >= 128 || len(v.asyncRequestsChan) == 0 {
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break
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}
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}
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if len(currentRequests) == 0 {
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continue
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}
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v.dataFileAccessLock.Lock()
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end, _, e := v.DataBackend.GetStat()
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if e != nil {
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for i := 0; i < len(currentRequests); i++ {
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currentRequests[i].Complete(0, 0, false,
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fmt.Errorf("cannot read current volume position: %v", e))
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}
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v.dataFileAccessLock.Unlock()
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continue
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}
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for i := 0; i < len(currentRequests); i++ {
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if currentRequests[i].IsWriteRequest {
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offset, size, isUnchanged, err := v.doWriteRequest(currentRequests[i].N)
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currentRequests[i].UpdateResult(offset, uint64(size), isUnchanged, err)
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} else {
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size, err := v.doDeleteRequest(currentRequests[i].N)
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currentRequests[i].UpdateResult(0, uint64(size), false, err)
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}
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}
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if fsync {
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// if sync error, data is not reliable, we should mark the completed request as fail and rollback
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if err := v.DataBackend.Sync(); err != nil {
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// todo: this may generate dirty data or cause data inconsistent, may be weed need to panic?
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if te := v.DataBackend.Truncate(end); te != nil {
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glog.V(0).Infof("Failed to truncate %s back to %d with error: %v", v.DataBackend.Name(), end, te)
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}
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for i := 0; i < len(currentRequests); i++ {
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if currentRequests[i].IsSucceed() {
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currentRequests[i].UpdateResult(0, 0, false, err)
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}
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}
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}
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}
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for i := 0; i < len(currentRequests); i++ {
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currentRequests[i].Submit()
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}
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v.dataFileAccessLock.Unlock()
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}
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}()
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}
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type VolumeFileScanner interface {
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VisitSuperBlock(super_block.SuperBlock) error
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ReadNeedleBody() bool
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