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https://issues.apache.org/jira/browse/HADOOP-1274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490198
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Michael Bieniosek commented on HADOOP-1274:
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See my HADOOP-1245. Currently this is possible by setting
mapred.tasktracker.tasks.maximum differently for tasktrackers, but the
jobtracker will assign an inappropriate number of jobs when it initially
creates the job.
> Configuring different number of mappers and reducers per TaskTracker
> --------------------------------------------------------------------
>
> Key: HADOOP-1274
> URL: https://issues.apache.org/jira/browse/HADOOP-1274
> Project: Hadoop
> Issue Type: Improvement
> Components: mapred
> Reporter: Koji Noguchi
> Priority: Minor
>
> Depending on the application, it sometimes make sense to have more mappers
> than reducers assigned to each node.
> (I'm assuming user either has a dedicated cluster or use HOD.)
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