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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-4781) Support intra-queue preemption for fairness ordering policy.
Date Tue, 12 Apr 2016 00:04:25 GMT

     [ https://issues.apache.org/jira/browse/YARN-4781?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wangda Tan updated YARN-4781:
-----------------------------
    Issue Type: Sub-task  (was: Bug)
        Parent: YARN-4945

> 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
>
> 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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