[jira] [Updated] (YARN-2004) Priority scheduling support in Capacity scheduler

["Sunil G (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-2004?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sunil G updated YARN-2004:
--------------------------
    Attachment: 0001-YARN-2004.patch

Attaching an initial patch for CS.

This does not cover headroom level adjustment which is needed for priority inversion problem. It can be handled in a separate ticket. Kindly review the patch.



> 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
>
>
> 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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