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https://issues.apache.org/jira/browse/YARN-4945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15478614#comment-15478614
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Sunil G commented on YARN-4945:
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Thanks [~eepayne] for the detailed comments.
Agreeing to the comments mostly. I will update them in next patch. Few doubts
or clarifications for below comments.
bq.It doesn't make sense to me to limit intra-queue preemption based on how
much of the queue's guaranteed resources are used.
I will try explain here. For queue, if there are plenty of resources unused
(guaranteed - used > 70%), then pending apps can get certain amount of
resources mostly (priority/user-limit etc). We can think on a safe default
limit here. Still this is per-queue only. Does this make sense?
> [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, YARN-2009-wip.v3.patch, YARN-2009.v0.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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