volume.tier.move: avoid double counting

related to https://github.com/chrislusf/seaweedfs/issues/2637

weed/shell/command_volume_tier_move.go

@@ -116,8 +116,10 @@ func (c *commandVolumeTierMove) Do(args []string, commandEnv *CommandEnv, writer
 
 				unlock := c.Lock(job.src)
 
-				if err := c.doMoveOneVolume(commandEnv, writer, job.vid, toDiskType, locations, job.src, dst, applyChanges); err != nil {
-					fmt.Fprintf(writer, "move volume %d %s => %s: %v\n", job.vid, job.src, dst.dataNode.Id, err)
+				if applyChanges {
+					if err := c.doMoveOneVolume(commandEnv, writer, job.vid, toDiskType, locations, job.src, dst); err != nil {
+						fmt.Fprintf(writer, "move volume %d %s => %s: %v\n", job.vid, job.src, dst.dataNode.Id, err)
+					}
 				}
 				unlock()
 			}
@@ -216,34 +218,27 @@ func (c *commandVolumeTierMove) doVolumeTierMove(commandEnv *CommandEnv, writer
 	return nil
 }
 
-func (c *commandVolumeTierMove) doMoveOneVolume(commandEnv *CommandEnv, writer io.Writer, vid needle.VolumeId, toDiskType types.DiskType, locations []wdclient.Location, sourceVolumeServer pb.ServerAddress, dst location, applyChanges bool) (err error) {
+func (c *commandVolumeTierMove) doMoveOneVolume(commandEnv *CommandEnv, writer io.Writer, vid needle.VolumeId, toDiskType types.DiskType, locations []wdclient.Location, sourceVolumeServer pb.ServerAddress, dst location) (err error) {
 
 	// mark all replicas as read only
-	if applyChanges {
-		if err = markVolumeReplicasWritable(commandEnv.option.GrpcDialOption, vid, locations, false); err != nil {
-			return fmt.Errorf("mark volume %d as readonly on %s: %v", vid, locations[0].Url, err)
-		}
-		if err = LiveMoveVolume(commandEnv.option.GrpcDialOption, writer, vid, sourceVolumeServer, pb.NewServerAddressFromDataNode(dst.dataNode), 5*time.Second, toDiskType.ReadableString(), true); err != nil {
-
-			// mark all replicas as writable
-			if err = markVolumeReplicasWritable(commandEnv.option.GrpcDialOption, vid, locations, true); err != nil {
-				glog.Errorf("mark volume %d as writable on %s: %v", vid, locations[0].Url, err)
-			}
+	if err = markVolumeReplicasWritable(commandEnv.option.GrpcDialOption, vid, locations, false); err != nil {
+		return fmt.Errorf("mark volume %d as readonly on %s: %v", vid, locations[0].Url, err)
+	}
+	if err = LiveMoveVolume(commandEnv.option.GrpcDialOption, writer, vid, sourceVolumeServer, pb.NewServerAddressFromDataNode(dst.dataNode), 5*time.Second, toDiskType.ReadableString(), true); err != nil {
 
-			return fmt.Errorf("move volume %d %s => %s : %v", vid, locations[0].Url, dst.dataNode.Id, err)
+		// mark all replicas as writable
+		if err = markVolumeReplicasWritable(commandEnv.option.GrpcDialOption, vid, locations, true); err != nil {
+			glog.Errorf("mark volume %d as writable on %s: %v", vid, locations[0].Url, err)
 		}
-	}
 
-	// adjust volume count
-	dst.dataNode.DiskInfos[string(toDiskType)].VolumeCount++
+		return fmt.Errorf("move volume %d %s => %s : %v", vid, locations[0].Url, dst.dataNode.Id, err)
+	}
 
 	// remove the remaining replicas
 	for _, loc := range locations {
 		if loc.Url != dst.dataNode.Id && loc.ServerAddress() != sourceVolumeServer {
-			if applyChanges {
-				if err = deleteVolume(commandEnv.option.GrpcDialOption, vid, loc.ServerAddress()); err != nil {
-					fmt.Fprintf(writer, "failed to delete volume %d on %s: %v\n", vid, loc.Url, err)
-				}
+			if err = deleteVolume(commandEnv.option.GrpcDialOption, vid, loc.ServerAddress()); err != nil {
+				fmt.Fprintf(writer, "failed to delete volume %d on %s: %v\n", vid, loc.Url, err)
 			}
 			// reduce volume count? Not really necessary since they are "more" full and will not be a candidate to move to
 		}