diff options
| -rw-r--r-- | weed/storage/volume_write.go | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/weed/storage/volume_write.go b/weed/storage/volume_write.go index 8b731e028..434e296d4 100644 --- a/weed/storage/volume_write.go +++ b/weed/storage/volume_write.go @@ -4,11 +4,12 @@ import ( "bytes" "errors" "fmt" + "os" + "github.com/seaweedfs/seaweedfs/weed/glog" "github.com/seaweedfs/seaweedfs/weed/storage/backend" "github.com/seaweedfs/seaweedfs/weed/storage/needle" . "github.com/seaweedfs/seaweedfs/weed/storage/types" - "os" ) var ErrorNotFound = errors.New("not found") @@ -323,6 +324,19 @@ func (v *Volume) WriteNeedleBlob(needleId NeedleId, needleBlob []byte, size Size return fmt.Errorf("volume size limit %d exceeded! current size is %d", MaxPossibleVolumeSize, v.nm.ContentSize()) } + nv, ok := v.nm.Get(needleId) + if ok && nv.Size == size { + oldNeedle := new(needle.Needle) + err := oldNeedle.ReadData(v.DataBackend, nv.Offset.ToActualOffset(), nv.Size, v.Version()) + if err == nil { + newNeedle := new(needle.Needle) + err = newNeedle.ReadBytes(needleBlob, nv.Offset.ToActualOffset(), size, v.Version()) + if err == nil && oldNeedle.Cookie == newNeedle.Cookie && oldNeedle.Checksum == newNeedle.Checksum && bytes.Equal(oldNeedle.Data, newNeedle.Data) { + glog.V(0).Infof("needle %v already exists", needleId) + return nil + } + } + } appendAtNs := needle.GetAppendAtNs(v.lastAppendAtNs) offset, err := needle.WriteNeedleBlob(v.DataBackend, needleBlob, size, appendAtNs, v.Version()) |