get mapper number in pipes

[Brian Seaman <bs...@truveo.com>]

Hi,

I am trying to figure out if it is possible to extract the number of the
mapper running in the actual mapper of a pipes job.  There are
occasionally times when I want to rerun a job but not have certain mappers
emit data depending on what they did the previous time.  I can pass in
which mappers to skip in a config file but can't figure out how to find
the number of the mapper currently running.

Any help will be greatly appreciated.

Thanks,

-Brian