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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 Wed, 09 Mar 2016 18:42:40 GMT

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

Wangda Tan updated YARN-4781:
-----------------------------
    Description: 
We introduced fairness queue policy since YARN-, 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.

> 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-, 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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