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https://issues.apache.org/jira/browse/OOZIE-260?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roman Shaposhnik reopened OOZIE-260:
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> GH-369: EL Math functions to allow dynamic reducer calculation
> --------------------------------------------------------------
>
> Key: OOZIE-260
> URL: https://issues.apache.org/jira/browse/OOZIE-260
> Project: Oozie
> Issue Type: Bug
> Reporter: Hadoop QA
>
> I'm proposing adding a MathFunctions class to define EL functions which will
> allow dynamic reducer calculations. Specifically: min, max, round, toLong. I
> can add others if people think they would be useful.
> I was thinking that the reducer calculation would look something like this in
> the workflow.xml:
> <property>
> <name>mapred.reduce.tasks</name>
> <value>${min(round(fs:dirSize(processing_dir) / 128000), 100)}</value>
> </property>
> For the background on this request, here is the email thread with Alejandro:
> http://tech.groups.yahoo.com/group/Oozie-users/message/753
> I'll post when I have the code changes finished and tested.
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