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From "Jonathan Hung (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5293) Disable preemption per queue per partition
Date Thu, 30 Jun 2016 21:20:10 GMT

    [ https://issues.apache.org/jira/browse/YARN-5293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15357871#comment-15357871
] 

Jonathan Hung commented on YARN-5293:
-------------------------------------

[~sunilg] and [~leftnoteasy], thanks for the clarifications. I think these make sense.

One concern I have is regarding when label exclusivity is disabled. If I understand correctly,
[YARN-2498|https://issues.apache.org/jira/browse/YARN-2498] keeps track of the containers
which ignore partition exclusivity. So if we disable preemption for a queue-label, we can
still preempt the containers with NO_LABEL running on a partition. That way specifying preemption
disabled for a queue-label only disables preemption for containers with that label so we can
avoid the scenario of indirectly disabling preemption for NO_LABEL containers on non-default
partitions.

> Disable preemption per queue per partition
> ------------------------------------------
>
>                 Key: YARN-5293
>                 URL: https://issues.apache.org/jira/browse/YARN-5293
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler
>            Reporter: Jonathan Hung
>
> [YARN-2056|https://issues.apache.org/jira/browse/YARN-2056] added support for disabling
preemption at queue level. [YARN-2498|https://issues.apache.org/jira/browse/YARN-2498] added
support for per partition preemption. It would be useful to be able to disable preemption
per partition per queue, so that if a queue Q has access to two labels A and B, we can disable
preemption for Q in A but not in B.



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