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Posted to common-dev@hadoop.apache.org by "Sameer Paranjpye (JIRA)" <ji...@apache.org> on 2007/06/27 19:11:27 UTC

[jira] Updated: (HADOOP-945) Heavy map tasks should be assigned first

     [ https://issues.apache.org/jira/browse/HADOOP-945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sameer Paranjpye updated HADOOP-945:
------------------------------------

    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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