[jira] [Commented] (YARN-166) capacity scheduler doesn't allow capacity < 1.0

["Robert Joseph Evans (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13487900#comment-13487900 ] 

Robert Joseph Evans commented on YARN-166:
------------------------------------------

The changes look good to me.  My only concern with setting the capacity to 0 would be it could be possible to create a queue where a user would never be able to run anything, even if it is just to drain the queue of apps currently running.  Of course I suppose that is currently possible with a minimum of 1% on a small grid.  I am +1 on the patch.
                
> capacity scheduler doesn't allow capacity < 1.0
> -----------------------------------------------
>
>                 Key: YARN-166
>                 URL: https://issues.apache.org/jira/browse/YARN-166
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 0.23.3
>            Reporter: Thomas Graves
>            Assignee: Thomas Graves
>         Attachments: YARN-166.patch
>
>
> 1.x supports queue capacity < 1, but in 0.23 the capacity scheduler doesn't.  This is an issue for us since we have a large cluster running 1.x that currently has a queue with capacity 0.5%.

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