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https://issues.apache.org/jira/browse/HBASE-13965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14643092#comment-14643092
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Ted Yu edited comment on HBASE-13965 at 7/27/15 5:39 PM:
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StochasticLoadBalancer related tests passed.
The two failed tests are not related to the patch:
{code}
Failed tests:
TestDistributedLogSplitting.testLogReplayTwoSequentialRSDown:653
expected:<1000> but was:<961>
TestReplicationKillSlaveRS.killOneSlaveRS:34->TestReplicationKillRS.loadTableAndKillRS:89
Waited too much time for queueFailover replication. Waited 12639ms.
{code}
was (Author: [email protected]):
StochasticLoadBalancer related tests passed.
The two failed tests are not related to the patch.
> Stochastic Load Balancer JMX Metrics
> ------------------------------------
>
> Key: HBASE-13965
> URL: https://issues.apache.org/jira/browse/HBASE-13965
> Project: HBase
> Issue Type: Improvement
> Components: Balancer, metrics
> Reporter: Lei Chen
> Assignee: Lei Chen
> Attachments: HBASE-13965-v3.patch, HBASE-13965-v4.patch,
> HBASE-13965-v5.patch, HBASE-13965-v6.patch, HBASE-13965-v7.patch,
> HBASE-13965-v8.patch, HBASE-13965-v9.patch, HBASE-13965_v2.patch,
> HBase-13965-JConsole.png, HBase-13965-v1.patch,
> stochasticloadbalancerclasses_v2.png
>
>
> Today’s default HBase load balancer (the Stochastic load balancer) is cost
> function based. The cost function weights are tunable but no visibility into
> those cost function results is directly provided.
> A driving example is a cluster we have been tuning which has skewed rack size
> (one rack has half the nodes of the other few racks). We are tuning the
> cluster for uniform response time from all region servers with the ability to
> tolerate a rack failure. Balancing LocalityCost, RegionReplicaRack Cost and
> RegionCountSkew Cost is difficult without a way to attribute each cost
> function’s contribution to overall cost.
> What this jira proposes is to provide visibility via JMX into each cost
> function of the stochastic load balancer, as well as the overall cost of the
> balancing plan.
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