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https://issues.apache.org/jira/browse/MAPREDUCE-3451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13159860#comment-13159860
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Todd Lipcon commented on MAPREDUCE-3451:
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Hi Patrick. Yes, there is an AM-per-job in the current implementation. There's
some folks I know looking at bundling full workflows into a single AM, but they
would still be fairly short-lived and associated with a single submitting user.
> 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: scheduler
> Reporter: Patrick Wendell
> Assignee: Patrick Wendell
>
> 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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