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https://issues.apache.org/jira/browse/HBASE-24633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17154924#comment-17154924
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Clara Xiong commented on HBASE-24633:
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[StochasticLoadBalancer|https://github.com/apache/hbase/pull/2003/files#diff-0a0a26a744f6fa61f913310da4adbc8f]
is terribly slow. Nice to simplify. I wonder if we can overhaul it completely,
more heuristics than pure randomness. Will need some brainstorming.
> Remove data locality and StoreFileCostFunction for replica regions out of
> balancer's cost calculation
> -----------------------------------------------------------------------------------------------------
>
> Key: HBASE-24633
> URL: https://issues.apache.org/jira/browse/HBASE-24633
> Project: HBase
> Issue Type: Improvement
> Components: Balancer
> Affects Versions: 2.3.0
> Reporter: Huaxiang Sun
> Assignee: Huaxiang Sun
> Priority: Major
>
> We found one of the clusters with read replica enabled always balance lots of
> replica regions. going through the balancer's cost functions, found that data
> locality and StoreFileCost have same multiplier for both primary and replica
> regions. That is something we can improve. Data locality for replica regions
> should not be a dominant factor for balancer. We can either remove it out of
> balancer's picture for now and give it a small multiplier.
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