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HBASE-23335 : Improving cost functions array copy in StochasticLoadBalancer (#874)

This commit is contained in:
Viraj Jasani 2019-12-02 11:12:27 +05:30 committed by Michael Stack
parent f7839f5eb6
commit ad607a1d76
1 changed files with 2 additions and 6 deletions
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8
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java
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@ -417,9 +417,7 @@ public class StochasticLoadBalancer extends BaseLoadBalancer {
double currentCost = computeCost(cluster, Double.MAX_VALUE);
curOverallCost = currentCost;
for (int i = 0; i < this.curFunctionCosts.length; i++) {
curFunctionCosts[i] = tempFunctionCosts[i];
}
System.arraycopy(tempFunctionCosts, 0, curFunctionCosts, 0, curFunctionCosts.length);
double initCost = currentCost;
double newCost = currentCost;
@ -463,9 +461,7 @@ public class StochasticLoadBalancer extends BaseLoadBalancer {
// save for JMX
curOverallCost = currentCost;
for (int i = 0; i < this.curFunctionCosts.length; i++) {
curFunctionCosts[i] = tempFunctionCosts[i];
}
System.arraycopy(tempFunctionCosts, 0, curFunctionCosts, 0, curFunctionCosts.length);
} else {
// Put things back the way they were before.
// TODO: undo by remembering old values