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https://issues.apache.org/jira/browse/YARN-2099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14007841#comment-14007841
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Sandy Ryza commented on YARN-2099:
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I think the desired behavior here should be that a leaf queue's scheduling
policy determines which apps get containers preempted inside of it. For fair
share and DRF, the app to get a container preempted should be that which most
exceeds its fair share. Priorities come in to play by providing weightings on
the fair share. It would also be possible to add a leaf-level scheduling
policy that always preempts the app with the lowest priority.
I think that once YARN-596 is in we will actually have this behavior.
Thoughts? Anything I'm missing?
> Preemption in fair scheduler should consider app priorities
> -----------------------------------------------------------
>
> Key: YARN-2099
> URL: https://issues.apache.org/jira/browse/YARN-2099
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: api, resourcemanager
> Affects Versions: 2.5.0
> Reporter: Ashwin Shankar
>
> Fair scheduler should take app priorities into account while
> preempting containers.
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