[jira] [Commented] (ACCUMULO-3083) capability balancing

["Josh Elser (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ACCUMULO-3083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14110249#comment-14110249 ] 

Josh Elser commented on ACCUMULO-3083:
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Of interest in the YARN camp: YARN-796. Granted, it would likely make more sense to implement it in Slider (which could set its own label-aware balancer).

> capability balancing
> --------------------
>
>                 Key: ACCUMULO-3083
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3083
>             Project: Accumulo
>          Issue Type: Bug
>          Components: master
>            Reporter: Eric Newton
>
> I was thinking about balancing, in much the way that new container-based (yarn, mesos, etc) resource managers work.  The existing {{Balancers}} try to keep the number of tablets even over presumably homogeneous nodes.
> But as clusters age and are improved and expanded in piecemeal, the hardware capabilities will drift apart.  Some nodes may be capable of handling more load than others.  We may even want some nodes to have a trivial number of tablets so the data they serve is always cached.
> Tablet servers could advertise an attribute (or several).  Really, it would just be a name, like {{fatnode}} or {{metaonly}}.  These would then be used by the {{Balancer}} to favor or ignore tservers for balancing.



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