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https://issues.apache.org/jira/browse/HADOOP-945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sameer Paranjpye updated HADOOP-945:
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Component/s: mapred
> Heavy map tasks should be assigned first
> ----------------------------------------
>
> Key: HADOOP-945
> URL: https://issues.apache.org/jira/browse/HADOOP-945
> Project: Hadoop
> Issue Type: Improvement
> Components: mapred
> 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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