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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4945) [Umbrella] Capacity Scheduler Preemption Within a queue
Date Thu, 01 Sep 2016 21:50:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-4945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15456727#comment-15456727
] 

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

bq. Trying to do this coordination seems to me to be quite complicated.
Using logic similar to {{deductPreemptableResourcesBasedSelectedCandidates}} should be able
to achieve this, and I think it doesn't bring too many complexities to the implementation.


bq. Would it be sufficient to just avoid preempting during the intra-queue policies if there
are already containers in the selectedContainers list?
If we want to avoid excessive preemption, It may not sufficient to me. We need to adjust ideal
/ to-preempt resource properly as well.

> [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
>         Attachments: Intra-Queue Preemption Use Cases.pdf, IntraQueuepreemption-CapacityScheduler
(Design).pdf, YARN-2009-wip.2.patch, YARN-2009-wip.patch
>
>
> 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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