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MAPREDUCE-6070. yarn.app.am.resource.mb/cpu-vcores affects uber mode but is not documented. Contributed by Tsuyoshi OZAWA

This commit is contained in:
Jason Lowe 2014-09-11 16:19:23 +00:00
parent 4be95175cd
commit 9e28e089c6
2 changed files with 9 additions and 1 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -279,6 +279,9 @@ Release 2.6.0 - UNRELEASED
MAPREDUCE-6075. HistoryServerFileSystemStateStore can create zero-length
files (jlowe)
MAPREDUCE-6070. yarn.app.am.resource.mb/cpu-vcores affects uber mode but
is not documented (Tsuyoshi OZAWA via jlowe)
Release 2.5.1 - UNRELEASED
INCOMPATIBLE CHANGES

7
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
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@ -508,7 +508,12 @@
<description>Whether to enable the small-jobs "ubertask" optimization,
which runs "sufficiently small" jobs sequentially within a single JVM.
"Small" is defined by the following maxmaps, maxreduces, and maxbytes
settings. Users may override this value.
settings. Note that configurations for application masters also affect
the "Small" definition - yarn.app.mapreduce.am.resource.mb must be
larger than both mapreduce.map.memory.mb and mapreduce.reduce.memory.mb,
and yarn.app.mapreduce.am.resource.cpu-vcores must be larger than
both mapreduce.map.cpu.vcores and mapreduce.reduce.cpu.vcores to enable
ubertask. Users may override this value.
</description>
</property>