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https://issues.apache.org/jira/browse/HBASE-14473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell closed HBASE-14473.
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> Compute region locality in parallel
> -----------------------------------
>
>                 Key: HBASE-14473
>                 URL: https://issues.apache.org/jira/browse/HBASE-14473
>             Project: HBase
>          Issue Type: Bug
>          Components: Balancer
>    Affects Versions: 1.2.0
>            Reporter: Elliott Neil Clark
>            Assignee: Elliott Neil Clark
>            Priority: Major
>             Fix For: 1.2.0, 1.3.0, 2.0.0
>
>         Attachments: HBASE-14473-v1.patch, HBASE-14473-v2.patch, 
> HBASE-14473-v3.patch, HBASE-14473-v4.patch, HBASE-14473.patch
>
>
> Right now on large clusters it's necessary to turn off the locality balance 
> cost as it takes too long to compute the region locality. This is because 
> it's computed when need in serial.
> We should compute this in parallel before it's needed.



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