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HDFS >> mail # user >> Uber Job!

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,
On Mon, May 6, 2013 at 8:15 PM, Rahul Bhattacharjee <[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