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https://issues.apache.org/jira/browse/MAPREDUCE-532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12725770#action_12725770
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Rajiv Chittajallu commented on MAPREDUCE-532:
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I would prefer option 1. When we wan't to rate limit, absolute numbers is
always good.
> Option to limit max tasks started per job/queue
> ------------------------------------------------
>
> Key: MAPREDUCE-532
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-532
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Reporter: Rajiv Chittajallu
>
> For jobs which call external services, (eg: distcp, crawlers) user/admin
> should be able to control max parallel tasks spawned. There should be a
> mechanism to cap the capacity available for a queue/job.
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