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From Tsuyoshi OZAWA <ozawa.tsuyo...@gmail.com>
Subject Re: should i need tune mapred.child.java.opts option if i use yarn and MRV2?
Date Fri, 23 May 2014 15:29:04 GMT
Hi,
You need to set mapreduce.map.java.opts and mapreduce.reduce.java.opts
instead of mapred.child.java.opts to tune JVMs when you use MRv2.
Please note that you also need to tune
mapreduce.map.memory.mb/mapreduce.reduce.memory.mb to notify
ResourceManager of the amounts of resource usage.

This doc is also useful for you.
http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/ClusterSetup.html

Thanks,
- Tsuyoshi

On Thu, May 22, 2014 at 10:58 PM, ch huang <justlooks@gmail.com> wrote:
> hi,mailist:
>              i want to know if this option still cause limitation in YARN?



-- 
- Tsuyoshi

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