Hi, Bejoy Thanks for you reply.
where could I find the default value of mapred.reduce.tasks ? I have checked the core-site.xml, hdfs-site.xml and mapred-site.xml, but I haven't found it. 2012/9/11 Bejoy Ks <[email protected]> > Hi Lin > > The default value for number of reducers is 1 > > <name>mapred.reduce.tasks</name> > <value>1</value> > > It is not determined by data volume. You need to specify the number of > reducers for your mapreduce jobs as per your data volume. > > Regards > Bejoy KS > > On Tue, Sep 11, 2012 at 4:53 PM, Jason Yang <[email protected]>wrote: > >> Hi, all >> >> I was wondering what's the default number of reducer if I don't set it in >> configuration? >> >> Will it change dynamically according to the output volume of Mapper? >> >> -- >> YANG, Lin >> >> > -- YANG, Lin
