[jira] [Updated] (YARN-4752) [Umbrella] FairScheduler: Improve preemption

["Karthik Kambatla (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-4752?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Karthik Kambatla updated YARN-4752:
-----------------------------------
    Attachment: YARN-4752.FairSchedulerPreemptionOverhaul.pdf

Attached is a summary of the current issues and an outline on one approach to solve the issues. 

[~asuresh], [~ashwinshankar77], [~zxu] - would like to hear your thoughts on the approach. Thanks. 

> [Umbrella] FairScheduler: Improve preemption
> --------------------------------------------
>
>                 Key: YARN-4752
>                 URL: https://issues.apache.org/jira/browse/YARN-4752
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 2.8.0
>            Reporter: Karthik Kambatla
>         Attachments: YARN-4752.FairSchedulerPreemptionOverhaul.pdf
>
>
> A number of issues have been reported with respect to preemption in FairScheduler along the lines of:
> # FairScheduler preempts resources from nodes even if the resultant free resources cannot fit the incoming request.
> # Preemption doesn't preempt from sibling queues
> # Preemption doesn't preempt from sibling apps under the same queue that is over its fairshare
> # ...
> Filing this umbrella JIRA to group all the issues together and think of a comprehensive solution.



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