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From "Scott Chen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-1198) Alternatively schedule different types of tasks in fair share scheduler
Date Mon, 09 Nov 2009 21:53:32 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Scott Chen updated MAPREDUCE-1198:
----------------------------------

    Priority: Minor  (was: Major)

> Alternatively schedule different types of tasks in fair share scheduler
> -----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1198
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1198
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/fair-share
>            Reporter: Scott Chen
>            Assignee: Scott Chen
>            Priority: Minor
>
> Matei has mentioned in MAPREDUCE-961 that the current scheduler will first try to launch
map tasks until canLaunthTask() returns false then look for reduce tasks. This might starve
reduce task. He also mention that alternatively schedule different types of tasks can solve
this problem.

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