'final' is meant for admins to ensure certain values aren't overridable. However, in the example you gave, you'll see 15 (since it's 'final').
Arun On Dec 8, 2011, at 10:44 PM, Bejoy Ks wrote: > Hi experts > I have a query with the job.xml file in map reduce.I set some > value in mapred-site.xml and marked as final, say mapred.num.reduce.tasks=15. > When I submit my job I explicitly specified the number of reducers as -D > mapred.num.reduce.tasks=4. Now as expected my my job should run with 15 > reducers as I marked this value as final in my config file. Now what would be > the value that would be available for mapred.num.reduce.tasks in job.xml, 15 > or 4 ? > > Thank you > > Regards > Bejoy.K.S
