hi,maillist:
i try assign reduce number in commandline but seems not
useful,i run tera sort like this
# hadoop jar /usr/lib/hadoop-mapreduce/hadoop-mapreduce-examples.jar
terasort /alex/terasort/1G-input /alex/terasort/1G-output
-Dmapreduce.job.reduces=34
so default mapred-site.xml assign reducer number is 16,i try run it with 34
reducers,but the job run still as 16 reducers number,why?
here is some output:
Job Counters
Launched map tasks=1
Launched reduce tasks=16
Rack-local map tasks=1
Total time spent by all maps in occupied slots (ms)=2318
Total time spent by all reduces in occupied slots (ms)=99714
