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https://issues.apache.org/jira/browse/HBASE-25894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17347234#comment-17347234
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Duo Zhang commented on HBASE-25894:
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The url you given for your version is 404 for me...
Anyway, thank your for your suggestion. I also used the same trick in my PR,
which is only calcuate two region servers in regionMoved instead of always
calculate all region servers in cost.
https://github.com/apache/hbase/pull/3276/files#diff-a4227fe781c5959bbd3118dd472e28cf29d5641fee3dc2880537a42228235c8c
You can see the PR here.
Thanks.
> Improve the performance for region load and region count related cost
> functions
> -------------------------------------------------------------------------------
>
> Key: HBASE-25894
> URL: https://issues.apache.org/jira/browse/HBASE-25894
> Project: HBase
> Issue Type: Sub-task
> Components: Balancer, Performance
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
> Fix For: 3.0.0-alpha-1, 2.5.0
>
>
> For a large cluster, we have a lot of regions, so computing the whole cost
> will be expensive. We should try to remove the unnecessary calculation as
> much as possible.
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