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Posted to common-dev@hadoop.apache.org by "Owen O'Malley (JIRA)" <ji...@apache.org> on 2006/06/28 19:44:31 UTC

[jira] Resolved: (HADOOP-99) task trackers can only be assigned one task every heartbeat

     [ http://issues.apache.org/jira/browse/HADOOP-99?page=all ]
     
Owen O'Malley resolved HADOOP-99:
---------------------------------

    Resolution: Fixed

> task trackers can only be assigned one task every heartbeat
> -----------------------------------------------------------
>
>          Key: HADOOP-99
>          URL: http://issues.apache.org/jira/browse/HADOOP-99
>      Project: Hadoop
>         Type: Bug

>   Components: mapred
>     Versions: 0.1.0
>     Reporter: Owen O'Malley
>     Assignee: Owen O'Malley
>      Fix For: 0.4.0

>
> Task trackers only call pollForNewTask once per a heartbeat (10 seconds) rather than when a task finishes. Especially for quick maps this means that the cluster is under utilized, because each map finishes in a cycle and the task tracker never gets a second, third or fourth task to run.

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