Apache9 commented on a change in pull request #3415:
URL: https://github.com/apache/hbase/pull/3415#discussion_r657718761
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File path:
hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/CostFunction.java
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@@ -89,13 +89,14 @@ protected void regionMoved(int region, int oldServer, int
newServer) {
* @return The scaled value.
*/
protected static double scale(double min, double max, double value) {
- if (max <= min || value <= min) {
+ if (max <= min || value <= min
+ || Math.abs(max - min) <= 0.01 || Math.abs(value - min) <= 0.01) {
Review comment:
Is 0.01 a suitable threshold? At least make a constant maybe called
`DELTA`?
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File path:
hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java
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@@ -125,7 +125,7 @@
private int stepsPerRegion = 800;
private long maxRunningTime = 30 * 1000 * 1; // 30 seconds.
private int numRegionLoadsToRemember = 15;
- private float minCostNeedBalance = 0.05f;
+ private float minCostNeedBalance = 0.025f;
Review comment:
Is this change related?
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File path:
hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/BalancerClusterState.java
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@@ -290,7 +294,9 @@ public String getRack(ServerName server) {
}
numTables = tables.size();
+ LOG.info("number of tables = {}", numTables);
Review comment:
Is info the suitable level here? Or debug?
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