diff --git a/pkg/scheduler/api/node_info.go b/pkg/scheduler/api/node_info.go
index 52f573438c..948e5ebcf5 100644
--- a/pkg/scheduler/api/node_info.go
+++ b/pkg/scheduler/api/node_info.go
@@ -94,20 +94,20 @@ type NodeState struct {
 }
 
 type NodeUsage struct {
-	CpuUsageAvg map[string]float64
-	MemUsageAvg map[string]float64
+	CPUUsageAvg map[string]float64
+	MEMUsageAvg map[string]float64
 }
 
 func (nu *NodeUsage) DeepCopy() *NodeUsage {
 	newUsage := &NodeUsage{
-		CpuUsageAvg: make(map[string]float64),
-		MemUsageAvg: make(map[string]float64),
+		CPUUsageAvg: make(map[string]float64),
+		MEMUsageAvg: make(map[string]float64),
 	}
-	for k, v := range nu.CpuUsageAvg {
-		newUsage.CpuUsageAvg[k] = v
+	for k, v := range nu.CPUUsageAvg {
+		newUsage.CPUUsageAvg[k] = v
 	}
-	for k, v := range nu.MemUsageAvg {
-		newUsage.MemUsageAvg[k] = v
+	for k, v := range nu.MEMUsageAvg {
+		newUsage.MEMUsageAvg[k] = v
 	}
 	return newUsage
 }
diff --git a/pkg/scheduler/api/node_info_test.go b/pkg/scheduler/api/node_info_test.go
index c14e3c3a46..fb6615c6e4 100644
--- a/pkg/scheduler/api/node_info_test.go
+++ b/pkg/scheduler/api/node_info_test.go
@@ -58,6 +58,7 @@ func TestNodeInfo_AddPod(t *testing.T) {
 				OversubscriptionResource: EmptyResource(),
 				Allocatable:              buildResource("8000m", "10G"),
 				Capability:               buildResource("8000m", "10G"),
+				ResourceUsage:            &NodeUsage{},
 				State:                    NodeState{Phase: Ready},
 				Tasks: map[TaskID]*TaskInfo{
 					"c1/p1": NewTaskInfo(case01Pod1),
@@ -80,6 +81,7 @@ func TestNodeInfo_AddPod(t *testing.T) {
 				OversubscriptionResource: EmptyResource(),
 				Allocatable:              buildResource("2000m", "1G"),
 				Capability:               buildResource("2000m", "1G"),
+				ResourceUsage:            &NodeUsage{},
 				State:                    NodeState{Phase: Ready},
 				Tasks:                    map[TaskID]*TaskInfo{},
 				GPUDevices:               make(map[int]*GPUDevice),
@@ -138,6 +140,7 @@ func TestNodeInfo_RemovePod(t *testing.T) {
 				Pipelined:                EmptyResource(),
 				Allocatable:              buildResource("8000m", "10G"),
 				Capability:               buildResource("8000m", "10G"),
+				ResourceUsage:            &NodeUsage{},
 				State:                    NodeState{Phase: Ready},
 				Tasks: map[TaskID]*TaskInfo{
 					"c1/p1": NewTaskInfo(case01Pod1),
@@ -198,6 +201,7 @@ func TestNodeInfo_SetNode(t *testing.T) {
 				Pipelined:                EmptyResource(),
 				Allocatable:              buildResource("10", "10G"),
 				Capability:               buildResource("10", "10G"),
+				ResourceUsage:            &NodeUsage{},
 				State:                    NodeState{Phase: NotReady, Reason: "OutOfSync"},
 				Tasks: map[TaskID]*TaskInfo{
 					"c1/p1": NewTaskInfo(case01Pod1),
diff --git a/pkg/scheduler/cache/cache.go b/pkg/scheduler/cache/cache.go
index 4604c9d909..4cfd2c736c 100644
--- a/pkg/scheduler/cache/cache.go
+++ b/pkg/scheduler/cache/cache.go
@@ -633,7 +633,6 @@ func (sc *SchedulerCache) Run(stopCh <-chan struct{}) {
 		interval = time.Duration(defaultMetricsInternal)
 	}
 	go wait.Until(sc.GetMetricsData, interval, stopCh)
-
 }
 
 // WaitForCacheSync sync the cache with the api server
@@ -1200,8 +1199,8 @@ func (sc *SchedulerCache) GetMetricsData() {
 	sc.Mutex.Lock()
 	for k := range sc.Nodes {
 		nodeUsageMap[k] = &schedulingapi.NodeUsage{
-			CpuUsageAvg: make(map[string]float64),
-			MemUsageAvg: make(map[string]float64),
+			CPUUsageAvg: make(map[string]float64),
+			MEMUsageAvg: make(map[string]float64),
 		}
 	}
 	sc.Mutex.Unlock()
@@ -1227,11 +1226,11 @@ func (sc *SchedulerCache) GetMetricsData() {
 					switch metric {
 					case "cpu_usage_avg":
 						cpuUsage, _ := strconv.ParseFloat(value[0], 64)
-						nodeUsageMap[node].CpuUsageAvg[period] = cpuUsage
+						nodeUsageMap[node].CPUUsageAvg[period] = cpuUsage
 						klog.V(4).Infof("node: %v, CpuUsageAvg: %v, period:%v", node, cpuUsage, period)
 					case "mem_usage_avg":
 						memUsage, _ := strconv.ParseFloat(value[0], 64)
-						nodeUsageMap[node].MemUsageAvg[period] = memUsage
+						nodeUsageMap[node].MEMUsageAvg[period] = memUsage
 						klog.V(4).Infof("node: %v, MemUsageAvg: %v, period:%v", node, memUsage, period)
 					}
 				}
diff --git a/pkg/scheduler/cache/cache_test.go b/pkg/scheduler/cache/cache_test.go
index 08920aa703..936d73d202 100644
--- a/pkg/scheduler/cache/cache_test.go
+++ b/pkg/scheduler/cache/cache_test.go
@@ -212,7 +212,7 @@ func TestSchedulerCache_Bind_NodeWithInsufficientResources(t *testing.T) {
 		t.Errorf("expected task to remain the same after failed bind: \n %#v\n %#v", taskBeforeBind, taskAfterBind)
 	}
 
-	nodeAfterBind := cache.Nodes["n1"]
+	nodeAfterBind := cache.Nodes["n1"].Clone()
 	if !reflect.DeepEqual(nodeBeforeBind, nodeAfterBind) {
 		t.Errorf("expected node to remain the same after failed bind")
 	}
diff --git a/pkg/scheduler/plugins/usage/usage.go b/pkg/scheduler/plugins/usage/usage.go
index 1844cb137b..7ed3fb8a2d 100644
--- a/pkg/scheduler/plugins/usage/usage.go
+++ b/pkg/scheduler/plugins/usage/usage.go
@@ -29,8 +29,8 @@ import (
 const (
 	// PluginName indicates name of volcano scheduler plugin.
 	PluginName        = "usage"
-	cpuUsageAvgPrefix = "CpuUsageAvg."
-	memUsageAvgPrefix = "MemUsageAvg."
+	cpuUsageAvgPrefix = "CPUUsageAvg."
+	memUsageAvgPrefix = "MEMUsageAvg."
 	thresholdSection  = "thresholds"
 	cpuUsageAvg5m     = "5m"
 )
@@ -42,8 +42,8 @@ const (
      - name: usage
        arguments:
           thresholds:
-            CpuUsageAvg.5m: 80
-            MemUsageAvg.5m: 90
+            CPUUsageAvg.5m: 80
+            MEMUsageAvg.5m: 90
 */
 
 type thresholdConfig struct {
@@ -53,8 +53,8 @@ type thresholdConfig struct {
 
 type usagePlugin struct {
 	pluginArguments framework.Arguments
-	weight int
-	threshold thresholdConfig
+	weight          int
+	threshold       thresholdConfig
 }
 
 // New function returns usagePlugin object
@@ -87,7 +87,7 @@ func (up *usagePlugin) OnSessionOpen(ssn *framework.Session) {
 	if klog.V(4) {
 		for node := range ssn.Nodes {
 			usage := ssn.Nodes[node].ResourceUsage
-			klog.V(4).Infof("node:%v, cpu usage:%v, mem usage:%v", node, usage.CpuUsageAvg["5m"], usage.MemUsageAvg["5m"])
+			klog.V(4).Infof("node:%v, cpu usage:%v, mem usage:%v", node, usage.CPUUsageAvg["5m"], usage.MEMUsageAvg["5m"])
 		}
 	}
 
@@ -100,19 +100,19 @@ func (up *usagePlugin) OnSessionOpen(ssn *framework.Session) {
 		for k, v := range args {
 			key, _ := k.(string)
 			var val float64
-			switch v.(type) {
+			switch a := v.(type) {
 			case string:
-				val, _ = strconv.ParseFloat(v.(string), 64)
+				val, _ = strconv.ParseFloat(a, 64)
 			case int:
-				val = float64(v.(int))
+				val = float64(a)
 			case float64:
-				val = v.(float64)
+				val = a
 			default:
-				klog.V(4).Infof("The threshold %v is an unknown type", v)
+				klog.V(4).Infof("The threshold %v is an unknown type", a)
 			}
 			if strings.Contains(key, cpuUsageAvgPrefix) {
 				periodKey := strings.Replace(key, cpuUsageAvgPrefix, "", 1)
-				up.threshold.cpuUsageAvg[periodKey] = val	
+				up.threshold.cpuUsageAvg[periodKey] = val
 			}
 			if strings.Contains(key, memUsageAvgPrefix) {
 				periodKey := strings.Replace(key, memUsageAvgPrefix, "", 1)
@@ -127,16 +127,16 @@ func (up *usagePlugin) OnSessionOpen(ssn *framework.Session) {
 	predicateFn := func(task *api.TaskInfo, node *api.NodeInfo) error {
 		for period, value := range up.threshold.cpuUsageAvg {
 			klog.V(4).Infof("predicateFn cpuUsageAvg:%v", up.threshold.cpuUsageAvg)
-			if node.ResourceUsage.CpuUsageAvg[period] > value {
-				msg := fmt.Sprintf("Node %s cpu usage %f exceeds the threshold %f", node.Name, node.ResourceUsage.CpuUsageAvg[period], value)
+			if node.ResourceUsage.CPUUsageAvg[period] > value {
+				msg := fmt.Sprintf("Node %s cpu usage %f exceeds the threshold %f", node.Name, node.ResourceUsage.CPUUsageAvg[period], value)
 				return fmt.Errorf("plugin %s predicates failed %s", up.Name(), msg)
 			}
 		}
 
 		for period, value := range up.threshold.memUsageAvg {
 			klog.V(4).Infof("predicateFn memUsageAvg:%v", up.threshold.memUsageAvg)
-			if node.ResourceUsage.MemUsageAvg[period] > value {
-				msg := fmt.Sprintf("Node %s mem usage %f exceeds the threshold %f", node.Name, node.ResourceUsage.MemUsageAvg[period], value)
+			if node.ResourceUsage.MEMUsageAvg[period] > value {
+				msg := fmt.Sprintf("Node %s mem usage %f exceeds the threshold %f", node.Name, node.ResourceUsage.MEMUsageAvg[period], value)
 				return fmt.Errorf("plugin %s memory usage predicates failed %s", up.Name(), msg)
 			}
 		}
@@ -146,7 +146,7 @@ func (up *usagePlugin) OnSessionOpen(ssn *framework.Session) {
 
 	nodeOrderFn := func(task *api.TaskInfo, node *api.NodeInfo) (float64, error) {
 		score := 0.0
-		cpuUsage, exist := node.ResourceUsage.CpuUsageAvg[cpuUsageAvg5m]
+		cpuUsage, exist := node.ResourceUsage.CPUUsageAvg[cpuUsageAvg5m]
 		klog.V(4).Infof("Node %s cpu usage is %f.", node.Name, cpuUsage)
 		if !exist {
 			return 0, nil
diff --git a/pkg/scheduler/util_test.go b/pkg/scheduler/util_test.go
index dd08624801..c8f5504565 100644
--- a/pkg/scheduler/util_test.go
+++ b/pkg/scheduler/util_test.go
@@ -186,7 +186,7 @@ tiers:
 
 	var expectedConfigurations []conf.Configuration
 
-	_, tiers, configurations, err := unmarshalSchedulerConf(configuration)
+	_, tiers, configurations, _, err := unmarshalSchedulerConf(configuration)
 	if err != nil {
 		t.Errorf("Failed to load scheduler configuration: %v", err)
 	}