Hi Rahul, Can you please be more specific? Do you want to control mappers running simultaneously for your job ( I guess ) or the cluster as a whole? If for your job, and you want to control it on a per node basis, one way is to allocate more memory to each of your mapper so it occupies more than one slot. If a slot is free, a task will be scheduled on it and that's more or less out of your control, especially so in pig. In case you want a global cap on simultaneous mappers, its a little more complicated and inefficient too. A little more detail on your use case should get you better response on the list. Sorry if I misunderstood your quesiton.
Amogh On 9/15/10 3:02 AM, "Rahul Malviya" <rmalv...@apple.com> wrote: Hi, I want to control the number of mappers tasks running simultaneously. Is there a way to do that if I run Pig jobs on hadoop ? Any input is helpful. Thanks, Rahul
