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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2009) Priority support for preemption in ProportionalCapacityPreemptionPolicy
Date Wed, 26 Oct 2016 19:24:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-2009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15609409#comment-15609409
] 

Sunil G commented on YARN-2009:
-------------------------------

I understand the reason for this issue. Queue's free resource were not considered in the algorithm
while calculating idealAssigned. So current code will work in cases where queue is full or
overflowed. If queue is under-utilized, we may do over preemption.
I ll share a patch short while.

> Priority support for preemption in ProportionalCapacityPreemptionPolicy
> -----------------------------------------------------------------------
>
>                 Key: YARN-2009
>                 URL: https://issues.apache.org/jira/browse/YARN-2009
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler
>            Reporter: Devaraj K
>            Assignee: Sunil G
>         Attachments: YARN-2009.0001.patch, YARN-2009.0002.patch, YARN-2009.0003.patch,
YARN-2009.0004.patch, YARN-2009.0005.patch, YARN-2009.0006.patch, YARN-2009.0007.patch, YARN-2009.0008.patch,
YARN-2009.0009.patch, YARN-2009.0010.patch, YARN-2009.0011.patch, YARN-2009.0012.patch, YARN-2009.0013.patch,
YARN-2009.0014.patch, YARN-2009.0015.patch
>
>
> While preempting containers based on the queue ideal assignment, we may need to consider
preempting the low priority application containers first.



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