Hi, My mapred-site.xml is pretty simple.
<?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <!-- Put site-specific property overrides in this file. --> <configuration> <property> <name>mapred.job.tracker</name> <value>ub13:54311</value> <description>The host and port that the MapReduce job tracker runs at. If "local", then jobs are run in-process as a single map and reduce task. </description> </property> </configuration> where I should put the settings that you are saying ?? On Fri, May 20, 2011 at 6:55 PM, modemide <[email protected]> wrote: > what does your mapred-site.xml file say? > > I've used wordcount and had close to 12 reduces running on a 6 > datanode cluster on a 3 GB file. > > > I have a configuration in there which says: > mapred.reduce.tasks = 12 > > The reason I chose 12 was because it was recommended that I choose 2x > number of tasktrackers. > > > > > > On 5/20/11, praveenesh kumar <[email protected]> wrote: > > Hello everyone, > > > > I am using wordcount application to test on my hadoop cluster of 5 nodes. > > The file size is around 5 GB. > > Its taking around 2 min - 40 sec for execution. > > But when I am checking the JobTracker web portal, I am seeing only one > > reducer is running. Why so ?? > > How can I change the code so that I will run multiple reducers also ?? > > > > Thanks, > > Praveenesh > > >
