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From "Harsh J (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-478) separate jvm param for mapper and reducer
Date Thu, 12 Jan 2012 06:49:40 GMT

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

Harsh J updated MAPREDUCE-478:
------------------------------

    Fix Version/s:     (was: 0.21.0)
                   0.20.203.0
                   0.22.0

Adding a Fix Version for 0.20 since this was backported to it as well, in-via-the yahoo security
merge.
                
> 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: 0.20.203.0, 0.22.0
>
>         Attachments: 478.20S-1.patch, 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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