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From "Mikhail Antonov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14473) Compute region locality in parallel
Date Wed, 23 Sep 2015 21:13:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14905265#comment-14905265
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Mikhail Antonov commented on HBASE-14473:
-----------------------------------------

Thanks for explanation, looks good to me, +1.

This

bq. @return true if region locations got refreshed.

is inconsistent w/ what it actually returns, right? Should be "if  locations for some user
tables got refreshed"?

I suppose 5 hardcoded thread in threadpool are just fine. Also seems this class missing audience
annotation, do you want to add Private one?

> 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.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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