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Posted to common-dev@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2006/06/22 21:40:32 UTC

[jira] Commented: (HADOOP-313) running a reduce task standalone

    [ http://issues.apache.org/jira/browse/HADOOP-313?page=comments#action_12417356 ] 

Doug Cutting commented on HADOOP-313:
-------------------------------------

Shouldn't this go into the "test" tree rather than the core?

> running a reduce task standalone
> --------------------------------
>
>          Key: HADOOP-313
>          URL: http://issues.apache.org/jira/browse/HADOOP-313
>      Project: Hadoop
>         Type: Bug

>     Reporter: Michel Tourn
>     Assignee: Michel Tourn
>  Attachments: sareduce.patch
>
> This is a tool to reproduce problems and to run unit tests involving a reduce task.
> You just give it a reduce directory on the command line.
> Usage: java org.apache.hadoop.mapred.StandaloneReduceTask <taskdir> [<limitmaps>]
> taskdir name encodes: task_<jobid>_r_<partition>_<attempt>
> taskdir contains job.xml and one or more input files named: map_<dddd>.out
> You should run with the same -Xmx option as the TaskTracker child JVM

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