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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6070) yarn.app.am.resource.mb/cpu-vcores affects uber mode but is not documented
Date Fri, 12 Sep 2014 14:05:35 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14131562#comment-14131562
] 

Hudson commented on MAPREDUCE-6070:
-----------------------------------

SUCCESS: Integrated in Hadoop-Hdfs-trunk #1869 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1869/])
MAPREDUCE-6070. yarn.app.am.resource.mb/cpu-vcores affects uber mode but is not documented.
Contributed by Tsuyoshi OZAWA (jlowe: rev 9e28e089c6bcb0b264751bdfa1f994ce002ef2de)
* hadoop-mapreduce-project/CHANGES.txt
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml


> 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
>             Fix For: 2.6.0
>
>         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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