Thanks I was more interested to know about the use case of uber task On Monday, May 6, 2013, Mohammad Tariq wrote:
> Split creation is primarily InputForma's responsibility, IMHO. It's good > if splits overlap with the block, but it's not always true. > > Warm Regards, > Tariq > https://mtariq.jux.com/ > cloudfront.blogspot.com > > > On Mon, May 6, 2013 at 8:15 PM, Rahul Bhattacharjee < > [email protected] <javascript:_e({}, 'cvml', > '[email protected]');>> wrote: > >> Hi, >> >> I was going through the definition of Uber Job of Hadoop. >> >> A job is considered uber when it has 10 or less maps , one reducer and >> the complete data is less than one dfs block size. >> >> I have some doubts here- >> >> Splits are created as per the dfs block size.Creating 10 mappers are >> possible from one block of data by some settings change (changing the max >> split size). But trying to understand , why would some job need to run >> around 10 maps for 64 MB of data. >> One thing may be that the job is immensely CUP intensive. Will it be a >> correct assumption? or is there is any other reason for this. >> >> Thanks, >> Rahul >> >> >> > -- Sent from Gmail Mobile
