add tool to printout dat file content

unmaintained/see_dat/see_dat.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"flag"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/storage"
+)
+
+var (
+	volumePath       = flag.String("dir", "/tmp", "data directory to store files")
+	volumeCollection = flag.String("collection", "", "the volume collection name")
+	volumeId         = flag.Int("volumeId", -1, "a volume id. The volume should already exist in the dir. The volume index file should not exist.")
+)
+
+func main() {
+	flag.Parse()
+
+	var version storage.Version
+	vid := storage.VolumeId(*volumeId)
+	err := storage.ScanVolumeFile(*volumePath, *volumeCollection, vid,
+		storage.NeedleMapInMemory,
+		func(superBlock storage.SuperBlock) error {
+			version = superBlock.Version()
+			return nil
+		}, false, func(n *storage.Needle, offset int64) error {
+			glog.V(0).Infof("%d,%s%x offset %d size %d cookie %x",
+				*volumeId, n.Id, n.Cookie, offset, n.Size, n.Cookie)
+			return nil
+		})
+	if err != nil {
+		glog.Fatalf("Reading Volume File [ERROR] %s\n", err)
+	}
+
+}