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https://issues.apache.org/jira/browse/YARN-2004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14603516#comment-14603516
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Wangda Tan commented on YARN-2004:
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Thanks for updating, [~sunilg].

A quick comment before posting others, I think most of the code to check/update 
application priority can be reused by other schedulers. [~kasha], could you 
take a quick look at this patch to see if it is also needed for Fair Scheduler?

> Priority scheduling support in Capacity scheduler
> -------------------------------------------------
>
>                 Key: YARN-2004
>                 URL: https://issues.apache.org/jira/browse/YARN-2004
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler
>            Reporter: Sunil G
>            Assignee: Sunil G
>         Attachments: 0001-YARN-2004.patch, 0002-YARN-2004.patch, 
> 0003-YARN-2004.patch, 0004-YARN-2004.patch, 0005-YARN-2004.patch, 
> 0006-YARN-2004.patch, 0007-YARN-2004.patch
>
>
> Based on the priority of the application, Capacity Scheduler should be able 
> to give preference to application while doing scheduling.
> Comparator<FiCaSchedulerApp> applicationComparator can be changed as below.   
>         
> 1.    Check for Application priority. If priority is available, then return 
> the highest priority job.
> 2.    Otherwise continue with existing logic such as App ID comparison and 
> then TimeStamp comparison.



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