shell: volume.tier.move avoid moving all volumes to one destination

weed/shell/command_volume_tier_move.go

@@ -122,6 +122,8 @@ func doVolumeTierMove(commandEnv *CommandEnv, writer io.Writer, vid needle.Volum
 			hasFoundTarget = true
 
 			if !applyChanges {
+				// adjust volume count
+				dst.dataNode.DiskInfos[string(toDiskType)].VolumeCount++
 				break
 			}
 
@@ -133,6 +135,9 @@ func doVolumeTierMove(commandEnv *CommandEnv, writer io.Writer, vid needle.Volum
 				return fmt.Errorf("move volume %d %s => %s : %v", vid, locations[0].Url, dst.dataNode.Id, err)
 			}
 
+			// adjust volume count
+			dst.dataNode.DiskInfos[string(toDiskType)].VolumeCount++
+
 			// remove the remaining replicas
 			for _, loc := range locations {
 				if loc.Url != dst.dataNode.Id {