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Date: Thu, 25 Aug 2016 23:05:20 +0000 (UTC)
From: "Wangda Tan (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12957920.1460419286000.415333.1472166320551@Atlassian.JIRA>
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References: <JIRA.12957920.1460419286000@Atlassian.JIRA> <JIRA.12957920.1460419286720@arcas>
Subject: [jira] [Commented] (YARN-4945) [Umbrella] Capacity Scheduler
 Preemption Within a queue
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archived-at: Thu, 25 Aug 2016 23:05:22 -0000


    [ https://issues.apache.org/jira/browse/YARN-4945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15438052#comment-15438052 ] 

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

Thanks [~eepayne] for providing the detail use case requirements.

I haven't looked at contents in PDF yet, but for the overall requirements make sense, and they look like the most important use cases for intra-queue preemptions to me.

With existing framework added by [~sunilg], we should be able to support different scheduling policies (like fair, fifo, priority, etc.) by adding different preemptable-resource-calculator (decide ideal/preemptable resource for apps), and different preemptable-candidate-selector (decide containers to preempt).

> [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.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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