Thanks a ton for ur help Harsh . I am a newbie in hadoop. If i have set mapred.tasktracker.map.tasks.maximum = 4 mapred.tasktracker.reduce.tasks.maximum = 4 Should i also bother or set below values mapred.map.Tasks and mapred.reduce.Tasks . If yes then what is the ideal value?
On Fri, Aug 1, 2014 at 12:00 AM, Harsh J <ha...@cloudera.com> wrote: > You can perhaps start with a generic 4+4 configuration (which matches > your cores), and tune your way upwards or downwards from there based > on your results. > > On Thu, Jul 31, 2014 at 8:35 PM, Sindhu Hosamane <sindh...@gmail.com> > wrote: > > Hello friends , > > > > If i am running my experiment on a server with 2 processors (4 cores > each ) . > > To say it has 2 processors and 8 cores . > > What would be the ideal values for mapred.tasktracker.map.tasks.maximum > and mapred.tasktracker.reduce.tasks.maximum to get maximum performance. > > I am running cascalog queries on data of size 280 MB. > > I have multiple datanodes running on same machine. > > > > Your help is very much appreciated. > > > > > > Regards, > > sindhu > > > > > > -- > Harsh J >
