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https://issues.apache.org/jira/browse/HBASE-25894?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang updated HBASE-25894:
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Release Note:
In CostFromRegionLoadFunction, now we will only recompute the cost for a given
region server in regionMoved function, instead of computing all the costs every
time.
Introduced a DoubleArrayCost for better abstraction, and also try to only
compute the final cost on demand as the computation is also a bit expensive.
> 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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