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https://issues.apache.org/jira/browse/HBASE-15529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15295075#comment-15295075
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Hudson commented on HBASE-15529:
--------------------------------
FAILURE: Integrated in HBase-Trunk_matrix #939 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/939/])
HBASE-15529 Override needBalance in StochasticLoadBalancer (Guanghao (tedyu:
rev 0671cba65f8cbb133ee27b712dd29b09a8d99efa)
* hbase-server/src/test/java/org/apache/hadoop/hbase/TestRegionRebalancing.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestStochasticLoadBalancer2.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.java
*
hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestStochasticLoadBalancer.java
*
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java
> Override needBalance in StochasticLoadBalancer
> ----------------------------------------------
>
> Key: HBASE-15529
> URL: https://issues.apache.org/jira/browse/HBASE-15529
> Project: HBase
> Issue Type: Improvement
> Reporter: Guanghao Zhang
> Assignee: Guanghao Zhang
> Priority: Minor
> Fix For: 2.0.0, 1.4.0
>
> Attachments: 15529-v1.patch, HBASE-15529-v1.patch,
> HBASE-15529-v2.patch, HBASE-15529-v3.patch, HBASE-15529.patch
>
>
> StochasticLoadBalancer includes cost functions to compute the cost of region
> rount, r/w qps, table load, region locality, memstore size, and storefile
> size. Every cost function returns a number between 0 and 1 inclusive and the
> computed costs are scaled by their respective multipliers. The bigger
> multiplier means that the respective cost function have the bigger weight.
> But needBalance decide whether to balance only by region count and doesn't
> consider r/w qps, locality even you config these cost function with bigger
> multiplier. StochasticLoadBalancer should override needBalance and decide
> whether to balance by it's configs of cost functions.
> Add one new config hbase.master.balancer.stochastic.minCostNeedBalance,
> cluster need balance when (total cost / sum multiplier) > minCostNeedBalance.
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