update

src/evaluator.go

@@ -14,6 +14,8 @@ type Evaluator struct {
 	factorNode   float64
 	factorRack   float64
 	factorDomain float64
+
+	factorPack float64
 }
 
 func (eva *Evaluator) init(nodes []NodeStatus, tasks []Task) {
@@ -28,6 +30,7 @@ func (eva *Evaluator) init(nodes []NodeStatus, tasks []Task) {
 	eva.factorDomain = 40.0
 	eva.costNetwork = 0.0
 	eva.costLoad = 0.0
+	eva.factorPack = -1.0
 }
 
 func (eva *Evaluator) add(node NodeStatus, task Task) {
@@ -116,10 +119,7 @@ func (eva *Evaluator) remove(node NodeStatus, task Task) {
 }
 
 func (eva *Evaluator) calculate() float64 {
-	/* factor to determine spread or pack */
-	/* 1.0 spread, -1.0 pack */
-	factor := -1.0
-	return eva.costNetwork + factor*eva.costLoad/float64(eva.totalPS+eva.totalWorker)
+	return eva.costNetwork + eva.factorPack*eva.costLoad/float64(eva.totalPS+eva.totalWorker)
 }
 
 func evaluate(allocation Allocation) float64 {

src/ga.go

@@ -67,6 +67,11 @@ func fastBestFit(nodes []NodeStatus, tasks []Task) Allocation {
 	for _, task := range tasks {
 		minCost := math.MaxFloat64
 		var best *NodeStatus
+		if task.IsPS {
+			eva.factorPack = -1.0
+		} else {
+			eva.factorPack = 1.0
+		}
 		for i, node := range nodes {
 			if _, ok := allocation.TasksOnNode[node.ClientID]; !ok {
 				allocation.TasksOnNode[node.ClientID] = []Task{}