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From "Arun C Murthy (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3893) allow capacity scheduler configs maximum-applications and maximum-am-resource-percent configurable on a per queue basis
Date Mon, 05 Mar 2012 01:42:59 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13222105#comment-13222105
] 

Arun C Murthy commented on MAPREDUCE-3893:
------------------------------------------

Also, for small clusters we should cut down max-system-apps to 100 or so.
                
> allow capacity scheduler configs maximum-applications and maximum-am-resource-percent
configurable on a per queue basis
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3893
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3893
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Thomas Graves
>            Assignee: Eric Payne
>            Priority: Critical
>         Attachments: MAPREDUCE-3893-1.txt
>
>
> The capacity scheduler configs for  maximum-applications and maximum-am-resource-percent
are currently configured globally and then made proportional to each queue based on its capacity.
There are times when this may not work well.  some exampless -  if you have a queue that is
running on uberAM jobs, the jobs a queue is running always has a small number of containers,
and then you have the opposite where in a queue with very small capacity, you may want to
limit the am resources even more so you don't end up deadlocked with all your capacity being
used for app masters.
> I think we should make those configurable on a per queue basis.

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