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https://issues.apache.org/jira/browse/HADOOP-4295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christian Kunz resolved HADOOP-4295.
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Resolution: Won't Fix
> job-level configurable mapred.map.tasks.maximum and
> mapred.reduce.tasks.maximum
> --------------------------------------------------------------------------------
>
> Key: HADOOP-4295
> URL: https://issues.apache.org/jira/browse/HADOOP-4295
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: Christian Kunz
>
> Right now mapred.tasktracker.map.tasks.maximum and
> mapred.tasktracker.reduce.tasks.maximum are set on the tasktracker level.
> In absense of a smart tasktracker monitoring resources and deciding in an
> adaptive manner how many tasks can be run simultaneously, it would be nice to
> move these two configuration options to the job level. This would make it
> easier to optimize the performance of a batch of jobs.
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