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https://issues.apache.org/jira/browse/MAPREDUCE-698?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kevin Peterson updated MAPREDUCE-698:
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Attachment: MAPREDUCE-698-prelim.patch
Attached patch works for me, but I think I need to make some changes for
interaction with the multiple-assign before it's ready to commit. Patch is
relative to 0.20 branch.
It allows two new fields in the pools definition, "maxMaps" and "maxReduces".
My need for this is interacting with outside services (in this case, an HBase
cluster that's significantly smaller than my Hadoop cluster).
> 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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