diff --git a/weed/stats/metrics.go b/weed/stats/metrics.go
index 4393c280c..faf87ff09 100644
--- a/weed/stats/metrics.go
+++ b/weed/stats/metrics.go
@@ -76,7 +76,7 @@ var (
 			Subsystem: "master",
 			Name:      "volume_layout_total",
 			Help:      "Number of volumes in volume layouts",
-		}, []string{"collection", "replica", "type"})
+		}, []string{"collection", "dataCenter", "type"})
 
 	MasterLeaderChangeCounter = prometheus.NewCounterVec(
 		prometheus.CounterOpts{
diff --git a/weed/topology/volume_layout.go b/weed/topology/volume_layout.go
index 66f7118c9..f2c341b7c 100644
--- a/weed/topology/volume_layout.go
+++ b/weed/topology/volume_layout.go
@@ -356,9 +356,9 @@ func (vl *VolumeLayout) DoneGrowRequest() {
 
 func (vl *VolumeLayout) ShouldGrowVolumes(option *VolumeGrowOption) bool {
 	total, active, crowded := vl.GetActiveVolumeCount(option)
-	stats.MasterVolumeLayout.WithLabelValues(option.Collection, option.ReplicaPlacement.String(), "total").Set(float64(total))
-	stats.MasterVolumeLayout.WithLabelValues(option.Collection, option.ReplicaPlacement.String(), "active").Set(float64(active))
-	stats.MasterVolumeLayout.WithLabelValues(option.Collection, option.ReplicaPlacement.String(), "crowded").Set(float64(crowded))
+	stats.MasterVolumeLayout.WithLabelValues(option.Collection, option.DataCenter, "total").Set(float64(total))
+	stats.MasterVolumeLayout.WithLabelValues(option.Collection, option.DataCenter, "active").Set(float64(active))
+	stats.MasterVolumeLayout.WithLabelValues(option.Collection, option.DataCenter, "crowded").Set(float64(crowded))
 	//glog.V(0).Infof("active volume: %d, high usage volume: %d\n", active, high)
 	return active <= crowded
 }