Limit both numMapTasks and numReduceTasks
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Key: MAPREDUCE-1379
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1379
Project: Hadoop Map/Reduce
Issue Type: New Feature
Components: tasktracker
Affects Versions: 0.20.1
Reporter: Bochun Bai
Priority: Trivial
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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