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https://issues.apache.org/jira/browse/YARN-4390?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wangda Tan updated YARN-4390:
-----------------------------
Attachment: YARN-4390.poc-WIP.1.patch
And uploaded a WIP POC patch if you're interested to see what's the patch will
look like. (Need apply patch of YARN-4822 first). I haven't done any test yet,
no guarantee that it can be compiled successfully.
Could you please share your thoughts about the proposal? [~eepayne], [~sunilg],
[~curino].
> Consider container request size during CS preemption
> ----------------------------------------------------
>
> Key: YARN-4390
> URL: https://issues.apache.org/jira/browse/YARN-4390
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacity scheduler
> Affects Versions: 3.0.0, 2.8.0, 2.7.3
> Reporter: Eric Payne
> Assignee: Wangda Tan
> Attachments: YARN-4390-design.1.pdf, YARN-4390.poc-WIP.1.patch
>
>
> There are multiple reasons why preemption could unnecessarily preempt
> containers. One is that an app could be requesting a large container (say
> 8-GB), and the preemption monitor could conceivably preempt multiple
> containers (say 8, 1-GB containers) in order to fill the large container
> request. These smaller containers would then be rejected by the requesting AM
> and potentially given right back to the preempted app.
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