Predicting how many values will I see in a call to reduce?

Is there any way to know how many values I will see in a call to reduce without first counting through them all with the iterator? Under 0.21? 0.20? 0.19? Thanks, Anthony

Job without Output files

Hi I have a job where i did not need any reducers. I am using only mappers. At the moment, the output of job is generated in files. But i want to use only java api to do some calculation and i want that there should be no output from the mappers. So is it possible to make a job which did not produ

Re: Job without Output files

You can have no output files by creating a customized OutputFormat, but without output files, how do you get the output of result and what's the meaning of this job ? On Mon, Nov 8, 2010 at 3:49 AM, Shuja Rehman wrote: > Hi > > I have a job where i did not need any reducers. I am using only mapp