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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-478) separate jvm param for mapper and reducer
Date Mon, 17 Aug 2009 03:58:14 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arun C Murthy updated MAPREDUCE-478:
------------------------------------

      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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