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From "Yang Hao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-6176) To limit the map task number or reduce number of an application
Date Fri, 28 Nov 2014 06:26:12 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yang Hao updated MAPREDUCE-6176:
--------------------------------
    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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