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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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Description: As MapReduce is a batch framework of calculation, so people
may want to run application A as well as application B 、C, and a limit resource
be put on A. 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
(was: As MapReduce is a batch framework of calculation, so people may want to
run application A as well as application B 、C, but a limit resource should be
added on A. 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)
> To limit the map task number or reduce 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: 2.5.0, 2.4.1, 2.5.1, 2.5.2
> Reporter: Yang Hao
> Assignee: Yang Hao
> Labels: patch
> Fix For: 2.4.1
>
> Attachments: MAPREDUCE-6176.patch
>
>
> As MapReduce is a batch framework of calculation, so people may want to run
> application A as well as application B 、C, and a limit resource be put on A.
> 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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