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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