hi Sudhakara:
Thank you for your reply. I've lost the old job information which I
thought "mapreduce.reduce.shuffle.input.buffer.percent" was set to 0.9 in.
I cant make it to read hard coded value from MergeManagerImpl.java. So
maybe I made a mistake.
Thanks.
2014-05-17 1:45 GMT+08:00 sudhakar
Hi,
I find the defualt value for
"mapreduce.reduce.shuffle.input.buffer.percent" is 0.7
in mapred-default.xml but 0.9 in MergeManagerImpl.java. I wonder which
default value should I choose ? I think 0.9 maybe too high ?
Any help is appreciated.
Thanks.
"mapreduce.reduce.shuffle.input.buffer.percent" paramenter value is going
go sets by reading the mapred-site.xml, if you not specified value in
mapred-site.xml it reads value from mapred-default.xml. Its value in
mapred-default.xml is 0.7. So default value is 0.7. For various reason
mapreduce.redu
