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https://issues.apache.org/jira/browse/MAPREDUCE-3451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13413477#comment-13413477
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Patrick Wendell commented on MAPREDUCE-3451:
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We have several pieces of follow-up around this, and one of them can be looking
at moving SchedulerApp to an interface (this would involve changing the other
two schedulers as well to some extent).
I'd like to see that change occur in tandem with better documentation for
common scheduling components like SchedulerApp. The design goals of the RM
scheduling code are currently opaque to anyone trying to add new code. Better
documentation would make it clearer how to hook in a new scheduler the right
way.
> Port Fair Scheduler to MR2
> --------------------------
>
> Key: MAPREDUCE-3451
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3451
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: mrv2, scheduler
> Reporter: Patrick Wendell
> Assignee: Patrick Wendell
> Fix For: 2.0.1-alpha
>
> Attachments: MAPREDUCE-3451.v1.patch.txt,
> MAPREDUCE-3451.v2.patch.txt, MAPREDUCE-3451.v3.patch.txt,
> MAPREDUCE-3451.v4.patch.txt, MAPREDUCE-3451.v5.patch,
> MAPREDUCE-3451.v6.patch, MAPREDUCE-3451.v7.patch, MAPREDUCE-3451.v8.patch,
> MAPREDUCE-3451.v9.patch
>
>
> The Fair Scheduler is in widespread use today in MR1 clusters, but not yet
> ported to MR2. This is to track the porting of the Fair Scheduler to MR2 and
> will be updated to include design considerations and progress.
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