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Posted to issues@hbase.apache.org by "Duo Zhang (Jira)" <ji...@apache.org> on 2021/05/25 02:16:00 UTC

[jira] [Updated] (HBASE-25894) Improve the performance for region load and region count related cost functions

     [ https://issues.apache.org/jira/browse/HBASE-25894?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Duo Zhang updated HBASE-25894:
------------------------------
    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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