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From "Yufei Gu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4090) Make Collections.sort() more efficient in FSParentQueue.java
Date Thu, 09 Feb 2017 19:05:42 GMT

    [ https://issues.apache.org/jira/browse/YARN-4090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15860008#comment-15860008
] 

Yufei Gu commented on YARN-4090:
--------------------------------

Thanks [~zsl2007].
I think you get it covered. Things might affect resource usage would be:
# Submit an application
# Allocate tasks
# Move app from one queue to another
# Complete containers (both apps and tasks finish)
# Preempt containers 
# Nodes are down, this might not affect it directly, need to double check. Thanks Ray for
pointing out. 

I could miss something. Correct me if you have anything else. I guess the test cases need
to cover these. We might not need to worry about queue deletion since it seems not supported.


YARN-4691 is about same thing for FSLeafQueue. Make sense to me to combine YARN-4691 in this
JIRA. 

> Make Collections.sort() more efficient in FSParentQueue.java
> ------------------------------------------------------------
>
>                 Key: YARN-4090
>                 URL: https://issues.apache.org/jira/browse/YARN-4090
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler
>            Reporter: Xianyin Xin
>            Assignee: zhangshilong
>         Attachments: sampling1.jpg, sampling2.jpg, YARN-4090.001.patch, YARN-4090.002.patch,
YARN-4090.003.patch, YARN-4090.004.patch, YARN-4090.005.patch, YARN-4090.006.patch, YARN-4090-preview.patch,
YARN-4090-TestResult.pdf
>
>
> Collections.sort() consumes too much time in a scheduling round.



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