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https://issues.apache.org/jira/browse/MAPREDUCE-698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12768558#action_12768558
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Matei Zaharia commented on MAPREDUCE-698:
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Hi Kevin,
The patch looks reasonable for 0.20, though I haven't had a chance to look at
it in detail yet. For trunk, MAPREDUCE-706 should have made your life easier;
you should be able to just update the demand() method in PoolSchedulable to
return the min of the pool's maxMaps (or maxReduces) and the sum of its jobs'
demands. Let me know if you have trouble for that. In trunk there's also a
fairly detailed design doc for the fair scheduler that should be helpful.
Matei
> Per-pool task limits for the fair scheduler
> -------------------------------------------
>
> Key: MAPREDUCE-698
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-698
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: contrib/fair-share
> Reporter: Matei Zaharia
> Fix For: 0.21.0
>
> Attachments: MAPREDUCE-698-prelim.patch
>
>
> The fair scheduler could use a way to cap the share of a given pool similar
> to MAPREDUCE-532.
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