How to limit the number of containers requested by a pig script?

[Sunil S Nandihalli]

Hi Everybody,
 I would like to know how I can limit the number of concurrent containers
requested(and used ofcourse)  by my pig-script (not as a yarn queue
configuration or some such stuff..  I want to limit it from outside on a
 per job basis. I would ideally like to set the number in my pig-script.)
Can I do this?
Thanks,
Sunil.