[jira] [Commented] (HBASE-14473) Compute region locality in parallel

["Guanghao Zhang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-14473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14993293#comment-14993293 ] 

Guanghao Zhang commented on HBASE-14473:
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[~eclark] What do you think about that make region location cache time configurable again? Large cluster may need increase cache time to reduce the region locality computation. Small cluster may need config the cache time same with balancer period to response the locality change.

> 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 Clark
>            Assignee: Elliott Clark
>             Fix For: 2.0.0, 1.2.0, 1.3.0
>
>         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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