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Posted to mapreduce-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2015/05/06 05:33:42 UTC

[jira] [Updated] (MAPREDUCE-2393) No total min share limitation of all pools

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Allen Wittenauer updated MAPREDUCE-2393:
----------------------------------------
    Labels: BB2015-05-TBR fair scheduler  (was: fair scheduler)

> No total min share limitation of all pools
> ------------------------------------------
>
>                 Key: MAPREDUCE-2393
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2393
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: contrib/fair-share
>    Affects Versions: 0.21.0
>            Reporter: Denny Ye
>              Labels: BB2015-05-TBR, fair, scheduler
>         Attachments: MAPREDUCE-2393.patch
>
>
> hi, there is no limitation about min share of all pools with cluster total shares. User can define arbitrary amount of min share for each pool. It has such description in <fair scheduler design document>, but no regular code. 
> It may critical for slot distribution. One pool can hold all cluster slots to meet it's min share that greater than cluster total slots very much.
> If that case has happened, we should scaled down proportionally.



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