[jira] [Commented] (HBASE-17709) New MoveCostFunction that respects MaxMovePercent

["Kahlil Oppenheimer (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-17709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15890779#comment-15890779 ] 

Kahlil Oppenheimer commented on HBASE-17709:
--------------------------------------------

Not sure why this build failed, but I resubmitted a patch and made sure it was properly based off master. I can build locally and all tests pass locally.

> New MoveCostFunction that respects MaxMovePercent
> -------------------------------------------------
>
>                 Key: HBASE-17709
>                 URL: https://issues.apache.org/jira/browse/HBASE-17709
>             Project: HBase
>          Issue Type: Bug
>          Components: Balancer
>    Affects Versions: 1.2.0
>         Environment: CentOS Derivative with a derivative of the 3.18.43 kernel. HBase on CDH5.9.0 with some patches. HDFS CDH 5.9.0 with no patches.
>            Reporter: Kahlil Oppenheimer
>            Priority: Minor
>              Labels: patch
>         Attachments: HBASE-17709-00.patch, HBASE-17709-01.patch
>
>
> The balancer does not fully respect the maxMovePercent configuration. 
> Specifically, if the number of regions being moved is less than 600, the balancer currently allows that number of region moves regardless of what value is set for maxMovePercent.
> This patch fixes that behavior and simplifies the moveCost function as well. In addition, this patch adds short-circuiting logic to the balancer to terminate early once the maximum number of moves are reached (and assuming the new plan has enough of a cost improvement).



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