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https://issues.apache.org/jira/browse/MAPREDUCE-1379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bochun Bai updated MAPREDUCE-1379:
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Status: Patch Available (was: Open)
submit patch
> Limit both numMapTasks and numReduceTasks
> -----------------------------------------
>
> Key: MAPREDUCE-1379
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1379
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: tasktracker
> Affects Versions: 0.22.0
> Reporter: Bochun Bai
> Priority: Trivial
> Attachments: limit-both-numMapTasks-and-numReduceTasks.patch
>
>
> In some environment, the number of concurrent running process is very
> sensitive.
> mapreduce.tasktracker.map.tasks.maximum
> and
> mapreduce.tasktracker.reduce.tasks.maximum
> limit tasks running on each tasktracker separately.
> This patch limits them together.
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