yes,you are right ,thanks On Wed, Dec 11, 2013 at 7:16 AM, Adam Kawa <[email protected]> wrote:
> Accidentally, I clicked "Sent" by a mistake. Plase try: > > hadoop jar /usr/lib/hadoop-mapreduce/hadoop-mapreduce-examples.jar > terasort *-Dmapreduce.job.reduces=34* /alex/terasort/1G-input > /alex/terasort/1G-output > > > 2013/12/11 Adam Kawa <[email protected]> > >> Please try >> >> >> >> 2013/12/10 ch huang <[email protected]> >> >>> 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 >>> >> >> >
