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This commit is contained in:
Chris Lu 2013-10-31 12:55:19 -07:00
parent 54723c3713
commit 9e9b2c0703
1 changed files with 6 additions and 2 deletions
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8
go/storage/volume.go
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@ -144,7 +144,7 @@ func (v *Volume) maybeWriteSuperBlock() error {
} }
func (v *Volume) readSuperBlock() (err error) { func (v *Volume) readSuperBlock() (err error) {
if _, err = v.dataFile.Seek(0, 0); err != nil { if _, err = v.dataFile.Seek(0, 0); err != nil {
return fmt.Errorf("cannot seek to the beginning of %s: %s", v.dataFile, err.Error()) return fmt.Errorf("cannot seek to the beginning of %s: %s", v.dataFile.Name(), err.Error())
} }
header := make([]byte, SuperBlockSize) header := make([]byte, SuperBlockSize)
if _, e := v.dataFile.Read(header); e != nil { if _, e := v.dataFile.Read(header); e != nil {
@ -188,6 +188,7 @@ func (v *Volume) write(n *Needle) (size uint32, err error) {
defer v.accessLock.Unlock() defer v.accessLock.Unlock()
if v.isFileUnchanged(n) { if v.isFileUnchanged(n) {
size = n.Size size = n.Size
glog.V(4).Infof("needle is unchanged!")
return return
} }
var offset int64 var offset int64
@ -199,6 +200,7 @@ func (v *Volume) write(n *Needle) (size uint32, err error) {
if offset%NeedlePaddingSize != 0 { if offset%NeedlePaddingSize != 0 {
offset = offset + (NeedlePaddingSize - offset%NeedlePaddingSize) offset = offset + (NeedlePaddingSize - offset%NeedlePaddingSize)
if offset, err = v.dataFile.Seek(offset, 0); err != nil { if offset, err = v.dataFile.Seek(offset, 0); err != nil {
glog.V(4).Infof("failed to align in datafile %s: %s", v.dataFile.Name(), err.Error())
return return
} }
} }
@ -211,7 +213,9 @@ func (v *Volume) write(n *Needle) (size uint32, err error) {
} }
nv, ok := v.nm.Get(n.Id) nv, ok := v.nm.Get(n.Id)
if !ok || int64(nv.Offset)*NeedlePaddingSize < offset { if !ok || int64(nv.Offset)*NeedlePaddingSize < offset {
_, err = v.nm.Put(n.Id, uint32(offset/NeedlePaddingSize), n.Size) if _, err = v.nm.Put(n.Id, uint32(offset/NeedlePaddingSize), n.Size); err != nil {
glog.V(4).Infof("failed to save in needle map %d: %s", n.Id, err.Error())
}
} }
return return
} }