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From "Kahlil Oppenheimer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17709) New MoveCostFunction that respects MaxMovePercent
Date Wed, 01 Mar 2017 17:33:45 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Kahlil Oppenheimer updated HBASE-17709:
    Attachment: HBASE-17709-01.patch

> 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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