Heavy map tasks should be assigned first
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Key: HADOOP-945
URL: https://issues.apache.org/jira/browse/HADOOP-945
Project: Hadoop
Issue Type: Improvement
Reporter: Runping Qi
In many cases I noticed that a few heavy map tasks finished really late since
they were started late too. When the jobtracker chooses map tasks for task
trackers, it should takes the input data size of the tasks into account, and
try to assign the ones with large input first.
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