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From "Eric Payne (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4781) Support intra-queue preemption for fairness ordering policy.
Date Tue, 06 Mar 2018 23:25:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-4781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16388701#comment-16388701

Eric Payne commented on YARN-4781:

bq.I have a patch coded up if you would be interested.

For reference, uploading patch V001

> Support intra-queue preemption for fairness ordering policy.
> ------------------------------------------------------------
>                 Key: YARN-4781
>                 URL: https://issues.apache.org/jira/browse/YARN-4781
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: scheduler
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>            Priority: Major
>         Attachments: YARN-4781.001.patch
> We introduced fairness queue policy since YARN-3319, which will let large applications
make progresses and not starve small applications. However, if a large application takes the
queue’s resources, and containers of the large app has long lifespan, small applications
could still wait for resources for long time and SLAs cannot be guaranteed.
> Instead of wait for application release resources on their own, we need to preempt resources
of queue with fairness policy enabled.

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