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https://issues.apache.org/jira/browse/HBASE-25894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17351890#comment-17351890
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Andrew Kyle Purtell commented on HBASE-25894:
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Is there a compatibility issue that prevents this nice performance improvement
from going back to branch-2.3 and branch-2.4? I skimmed the patch and didn't
see one. We are computing the cost at a different time, but it is the same
formula, so the balancer behavior does not change?
> 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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