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From "Matei Zaharia (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-707) Provide a jobconf property for explicitly assigning a job to a pool
Date Tue, 03 Nov 2009 08:33:59 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12772945#action_12772945

Matei Zaharia commented on MAPREDUCE-707:

I agree, and the solution I proposed above doesn't require changing mapred-default.xml. Many
fair scheduler properties are in fair-scheduler.xml, but it would be nice to move some of
the other ones that are still in mapred-site.xml to there. This would also make it easier
to toggle them at runtime.

> Provide a jobconf property for explicitly assigning a job to a pool
> -------------------------------------------------------------------
>                 Key: MAPREDUCE-707
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-707
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: contrib/fair-share
>            Reporter: Matei Zaharia
>            Priority: Trivial
> A common use case of the fair scheduler is to have one pool per user, but then to define
some special pools for various production jobs, import jobs, etc. Therefore, it would be nice
if jobs went by default to the pool of the user who submitted them, but there was a setting
to explicitly place a job in another pool. Today, this can be achieved through a sort of trick
in the JobConf:
> {code}
> <property>
>   <name>mapred.fairscheduler.poolnameproperty</name>
>   <value>pool.name</value>
> </property>
> <property>
>   <name>pool.name</name>
>   <value>${user.name}</value>
> </property>
> {code}
> This JIRA proposes to add a property called mapred.fairscheduler.pool that allows a job
to be placed directly into a pool, avoiding the need for this trick.

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