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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4945) [Umbrella] Capacity Scheduler Preemption Within a queue
Date Wed, 27 Jul 2016 15:39:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-4945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15395858#comment-15395858
] 

Sunil G commented on YARN-4945:
-------------------------------

Extremely sorry for the delay. 
bq. With the proposed design, is it possible for an app to be preempted that is below its
user limit?
Yes, we should consider this case and should not allow preemption. However there could be
bounder line scenarios where high priority apps has more demand and we might preempt apps
(few containers) which may just over user-limit. Such deadzones will also be considered to
avoid over kills. We can see how existing tuning configs can be made use of intra-queue scenarios
too

> [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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