Vinod Kumar Vavilapalli commented on YARN-3318:

bq.  I think it should be fine to make policy interfaces define as well as 
CapacityScheduler changes together with this patch (only for 
FifoOrderingPolicy), it's good to see how interfaces and policies work in CS, 
is it easy or not, etc. =
We can still do this with patches on two JIRAs - one for the framework, one for 
CS, one for FS etc. The Fifo one can be here for demonstration, no problem with 
that. Why is it so hard to focus one thing in one JIRA?

> Create Initial OrderingPolicy Framework, integrate with CapacityScheduler 
> LeafQueue supporting present behavior
> ---------------------------------------------------------------------------------------------------------------
>                 Key: YARN-3318
>                 URL: https://issues.apache.org/jira/browse/YARN-3318
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: scheduler
>            Reporter: Craig Welch
>            Assignee: Craig Welch
>         Attachments: YARN-3318.13.patch, YARN-3318.14.patch, 
> YARN-3318.17.patch, YARN-3318.34.patch, YARN-3318.35.patch, 
> YARN-3318.36.patch, YARN-3318.39.patch
> Create the initial framework required for using OrderingPolicies with 
> SchedulerApplicaitonAttempts and integrate with the CapacityScheduler.   This 
> will include an implementation which is compatible with current FIFO behavior.

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