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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4945) [Umbrella] Capacity Scheduler Preemption Within a queue
Date Fri, 22 Jul 2016 17:17:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-4945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15389859#comment-15389859
] 

Wangda Tan commented on YARN-4945:
----------------------------------

[~eepayne], I totally agree that intra-queue preemption should happen only if applications
belong to the queue cannot get resource outside of the queue.

These bounds are: resources / partitions / user-limits. However, I think for non-accountable
(like First-come-first-serve) usage, for example locality, should not trigger preemption.
Preemption of FCFS usages could lead to excessive-preemption.

And [~sunilg] is also working on a POC / design, I think you can collaborate on this. Sunil,
could you give some brief updates of the POC/design efforts?

> [Umbrella] Capacity Scheduler Preemption Within a queue
> -------------------------------------------------------
>
>                 Key: YARN-4945
>                 URL: https://issues.apache.org/jira/browse/YARN-4945
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Wangda Tan
>
> This is umbrella ticket to track efforts of preemption within a queue to support features
like:
> YARN-2009. YARN-2113. YARN-4781.



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