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From Jean-Eric CAZAMEA <jecaza...@yahoo.com>
Subject Re: issue about enable UseNUMA flag in hadoop framework
Date Sun, 20 Sep 2015 11:14:26 GMT

     On Saturday, September 19, 2015 10:42 AM, Zhudacai <zhudacai@hisilicon.com> wrote:

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div.yiv7661362184WordSection1 {}-->Hi,ALL     We get a problem about enable UseNUMA flag
for my hadoop framework.    We've tried to specify JVM flags during hadoop daemon's starts,
e.g. export HADOOP_NAMENODE_OPTS="-XX:+UseNUMA -Dcom.sun.management.jmxremote $HADOOP_NAMENODE_OPTS",
etc. But the ratio between local and remote memory access is 2:1, just remains as same as
before.    Then we find that hadoop MapReduce start child JVM processes to run task in containers.
So we passes -XX:+UseNUMA to JVMs by set theting configuration parameter child.java.opts.
But hadoop starts to throw ExitCodeExceptionException (exitCode=1), seems that hadoop does
not support this JVM parameter.    What should we do to enable UseNUMA flag for my hadoop?
Or what should we do to decrease the local/remote memory access in NUMA framework? Should
we just change Hadoop script or resorts to source code? And how to do it?    The hadoop version
is 2.6.0.    Best Regards.    Dacai 

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