Carlo Curino commented on YARN-4358:

(1)/(2) done
(3) as discussed above... agreed to circle back later.
(4) was not address as the two fields are long and the diff might exceed int. 
(5) I implemented the requested changes and refactor a little further the 
PlanView interface and InMemoryPlan, getting rid of few methods which were not 
used anymore as we are switching to the more efficient RLE-centric requests to 
the plan. 

> Improve relationship between SharingPolicy and ReservationAgent
> ---------------------------------------------------------------
>                 Key: YARN-4358
>                 URL: https://issues.apache.org/jira/browse/YARN-4358
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler, fairscheduler, resourcemanager
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>             Fix For: 2.8.0
>         Attachments: YARN-4358.patch
> At the moment an agent places based on available resources, but has no 
> visibility to extra constraints imposed by the SharingPolicy. While not all 
> constraints are easily represented some (e.g., max-instantaneous resources) 
> are easily represented.

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