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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4212) FairScheduler: Can't create a DRF queue under a FAIR policy queue
Date Tue, 04 Apr 2017 16:45:42 GMT

    [ https://issues.apache.org/jira/browse/YARN-4212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15955394#comment-15955394
] 

ASF GitHub Bot commented on YARN-4212:
--------------------------------------

Github user flyrain commented on the issue:

    https://github.com/apache/hadoop/pull/181
  
    Committed.


> FairScheduler: Can't create a DRF queue under a FAIR policy queue
> -----------------------------------------------------------------
>
>                 Key: YARN-4212
>                 URL: https://issues.apache.org/jira/browse/YARN-4212
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Arun Suresh
>            Assignee: Yufei Gu
>              Labels: fairscheduler
>             Fix For: 2.9.0, 3.0.0-alpha3
>
>         Attachments: YARN-4212.002.patch, YARN-4212.003.patch, YARN-4212.004.patch, YARN-4212.005.patch,
YARN-4212.006.patch, YARN-4212.007.patch, YARN-4212.008.patch, YARN-4212.009.patch, YARN-4212.010.patch,
YARN-4212.011.patch, YARN-4212.1.patch
>
>
> The Fair Scheduler, while performing a {{recomputeShares()}} during an {{update()}} call,
uses the parent queues policy to distribute shares to its children.
> If the parent queues policy is 'fair', it only computes weight for memory and sets the
vcores fair share of its children to 0.
> Assuming a situation where we have 1 parent queue with policy 'fair' and multiple leaf
queues with policy 'drf', Any app submitted to the child queues with vcore requirement >
1 will always be above fairshare, since during the recomputeShare process, the child queues
were all assigned 0 for fairshare vcores.



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