Reduce memory usage for "weed fix"

go/storage/volume.go

@@ -309,6 +309,7 @@ func (v *Volume) freeze() error {
 
 func ScanVolumeFile(dirname string, collection string, id VolumeId,
 	visitSuperBlock func(SuperBlock) error,
+	readNeedleBody bool,
 	visitNeedle func(n *Needle, offset int64) error) (err error) {
 	var v *Volume
 	if v, err = loadVolumeWithoutIndex(dirname, collection, id); err != nil {
@@ -327,9 +328,11 @@ func ScanVolumeFile(dirname string, collection string, id VolumeId,
 		return
 	}
 	for n != nil {
-		if err = n.ReadNeedleBody(v.dataFile, version, offset+int64(NeedleHeaderSize), rest); err != nil {
-			err = fmt.Errorf("cannot read needle body: %s", err)
-			return
+		if readNeedleBody {
+			if err = n.ReadNeedleBody(v.dataFile, version, offset+int64(NeedleHeaderSize), rest); err != nil {
+				err = fmt.Errorf("cannot read needle body: %s", err)
+				return
+			}
 		}
 		if err = visitNeedle(n, offset); err != nil {
 			return

go/storage/volume_vacuum.go

@@ -62,7 +62,7 @@ func (v *Volume) copyDataAndGenerateIndexFile(dstName, idxName string) (err erro
 	err = ScanVolumeFile(v.dir, v.Collection, v.Id, func(superBlock SuperBlock) error {
 		_, err = dst.Write(superBlock.Bytes())
 		return err
-	}, func(n *Needle, offset int64) error {
+	}, true, func(n *Needle, offset int64) error {
 		nv, ok := v.nm.Get(n.Id)
 		glog.V(4).Infoln("needle expected offset ", offset, "ok", ok, "nv", nv)
 		if ok && int64(nv.Offset)*NeedlePaddingSize == offset && nv.Size > 0 {

go/weed/export.go

@@ -102,7 +102,7 @@ func runExport(cmd *Command, args []string) bool {
 	err = storage.ScanVolumeFile(*exportVolumePath, *exportCollection, vid, func(superBlock storage.SuperBlock) error {
 		version = superBlock.Version
 		return nil
-	}, func(n *storage.Needle, offset int64) error {
+	}, true, func(n *storage.Needle, offset int64) error {
 		nv, ok := nm.Get(n.Id)
 		glog.V(3).Infoln("key", n.Id, "offset", offset, "size", n.Size, "disk_size", n.DiskSize(), "gzip", n.IsGzipped(), "ok", ok, "nv", nv)
 		if ok && nv.Size > 0 {

go/weed/fix.go

@@ -49,7 +49,7 @@ func runFix(cmd *Command, args []string) bool {
 	vid := storage.VolumeId(*fixVolumeId)
 	err = storage.ScanVolumeFile(*fixVolumePath, *fixVolumeCollection, vid, func(superBlock storage.SuperBlock) error {
 		return nil
-	}, func(n *storage.Needle, offset int64) error {
+	}, false, func(n *storage.Needle, offset int64) error {
 		debug("key", n.Id, "offset", offset, "size", n.Size, "disk_size", n.DiskSize(), "gzip", n.IsGzipped())
 		if n.Size > 0 {
 			count, pe := nm.Put(n.Id, uint32(offset/storage.NeedlePaddingSize), n.Size)