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Default values mapred-ste.xml

Question asked by sathvik on Aug 11, 2013
Hi All,

I am new to MapR environment and have beginner knowledge in Hadoop.
There are few properties in mapred-site.xml  which are blank few others are pointing to log file

Properties which are blank:
  mapred.job.map.memory.physical.mb,mapred.job.reduce.memory.physical.mb

Property pointing to the log file:
mapred.map.child.java.opts = -XX:ErrorFile=/opt/cores/mapreduce_java_error%p.log

what does it mean?

ALso what is the default value for blank values and how I can determine the blank values (any env variables)

Thanks for your valuable time

--Manoj


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