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Posted to yarn-issues@hadoop.apache.org by "Wangda Tan (JIRA)" <ji...@apache.org> on 2018/05/01 00:10:00 UTC
[jira] [Assigned] (YARN-4781) Support intra-queue preemption for
fairness ordering policy.
[ https://issues.apache.org/jira/browse/YARN-4781?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wangda Tan reassigned YARN-4781:
--------------------------------
Assignee: Eric Payne (was: Wangda Tan)
> 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: Eric Payne
> Priority: Major
> Attachments: YARN-4781.001.patch, YARN-4781.002.patch, YARN-4781.003.patch, YARN-4781.004.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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