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From "Arsen Zahray (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-3096) Add a good way to control the number of map/reduce tasks per node
Date Mon, 26 Sep 2011 20:40:13 GMT
Add a good way to control the number of map/reduce tasks per node
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                 Key: MAPREDUCE-3096
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3096
             Project: Hadoop Map/Reduce
          Issue Type: Task
            Reporter: Arsen Zahray
             Fix For: 0.20.204.0


Currently, controlling the number of map/reduce tasks is a hell.

I've tried for it many times, and it doesn't work right. Also, I am not the only one person,
who seems to have this problem.

There must be a better way to do it.

Here's my proposal:

add following functions to Job:
setNumberOfMappersPerNode(int);
setNumberOfReducersPerNode(int);
setMaxMemoryPerMapper(int);
setMaxMemoryPerReducer(int);

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