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From "Tsuyoshi OZAWA (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-6070) yarn.app.am.resource.mb/cpu-vcores affects uber mode but is not documented
Date Fri, 05 Sep 2014 16:23:28 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6070?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsuyoshi OZAWA updated MAPREDUCE-6070:
--------------------------------------
    Attachment: MAPREDUCE-6070.2.patch

Thanks for your review, Jason. I think your point is reasonable. Updated a patch to move the
description into mapreduce.job.ubertask.enable.

> yarn.app.am.resource.mb/cpu-vcores affects uber mode but is not documented
> --------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6070
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6070
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: documentation
>    Affects Versions: 2.4.0, 2.5.0
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Tsuyoshi OZAWA
>            Priority: Trivial
>         Attachments: MAPREDUCE-6070.2.patch, YARN-2078.1.patch
>
>
> We should document the condition when uber mode is enabled. Currently, users need to
read following code to understand the condition.
> {code}
>     boolean smallMemory =
>         ( (Math.max(conf.getLong(MRJobConfig.MAP_MEMORY_MB, 0),
>             conf.getLong(MRJobConfig.REDUCE_MEMORY_MB, 0))
>             <= sysMemSizeForUberSlot)
>             || (sysMemSizeForUberSlot == JobConf.DISABLED_MEMORY_LIMIT));
>    boolean smallCpu =
>             Math.max(
>                 conf.getInt(
>                     MRJobConfig.MAP_CPU_VCORES, 
>                     MRJobConfig.DEFAULT_MAP_CPU_VCORES), 
>                 conf.getInt(
>                     MRJobConfig.REDUCE_CPU_VCORES, 
>                     MRJobConfig.DEFAULT_REDUCE_CPU_VCORES)) 
>              <= sysCPUSizeForUberSlot
> {code}



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