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From "Bochun Bai (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-1379) Limit both numMapTasks and numReduceTasks
Date Fri, 15 Jan 2010 06:37:00 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Bochun Bai updated MAPREDUCE-1379:
----------------------------------

    Affects Version/s:     (was: 0.20.1)
                       0.22.0

> 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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