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https://issues.apache.org/jira/browse/MAPREDUCE-6176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yang Hao updated MAPREDUCE-6176:
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Target Version/s: 2.5.2, 2.5.1, 2.4.1, 2.5.0 (was: 2.5.0, 2.4.1, 2.5.1,
2.5.2)
Status: Open (was: Patch Available)
> Users should limit the number of an application
> -----------------------------------------------
>
> Key: MAPREDUCE-6176
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6176
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: mr-am, mrv2
> Affects Versions: 2.5.2, 2.5.1, 2.4.1, 2.5.0
> Reporter: Yang Hao
> Assignee: Yang Hao
> Labels: patch
> Fix For: 2.4.1
>
>
> As MapReduce is batch framework of calculation, so people may want to run
> application A as well as application B . A good way to do so is that we can
> limit the number of application's map task or reduce task. If we set
> mapreduce.map.num.max as M, then the map task number will not exceed M. At
> the same time, if we set mapreduce.map.num.max as R, then the reduce task
> number will not exceed R
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