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https://issues.apache.org/jira/browse/MAPREDUCE-478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arun C Murthy updated MAPREDUCE-478:
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Resolution: Fixed
Release Note:
Allow map and reduce jvm parameters, environment variables and ulimit to be set
separately.
Configuration changes:
add mapred.map.child.java.opts
add mapred.reduce.child.java.opts
add mapred.map.child.env
add mapred.reduce.child.ulimit
add mapred.map.child.env
add mapred.reduce.child.ulimit
deprecated mapred.child.java.opts
deprecated mapred.child.env
deprecated mapred.child.ulimit
Hadoop Flags: [Reviewed]
Status: Resolved (was: Patch Available)
I just committed this.
> separate jvm param for mapper and reducer
> -----------------------------------------
>
> Key: MAPREDUCE-478
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-478
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Koji Noguchi
> Assignee: Arun C Murthy
> Priority: Minor
> Fix For: 0.21.0
>
> Attachments: HADOOP-5684_0_20090420.patch,
> MAPREDUCE-478_0_20090804.patch, MAPREDUCE-478_0_20090804_yhadoop20.patch,
> MAPREDUCE-478_1_20090806.patch, MAPREDUCE-478_1_20090806_yhadoop20.patch,
> MAPREDUCE-478_2_20090813.patch, MAPREDUCE-478_2_20090813.patch,
> MAPREDUCE-478_2_20090813_yhadoop.patch, MAPREDUCE-478_3_20090814.patch,
> MAPREDUCE-478_3_20090814_yhadoop.patch
>
>
> Memory footprint of mapper and reducer can differ.
> It would be nice if we can pass different jvm param (mapred.child.java.opts)
> for mappers and reducers.
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