Hi brian,
thanks for your reply.
Can you suggest me any way of solving my problem?
Shall i move away from MPI?
Any suggestions are welcome!
Awaititng for your reply.
PS:
I am doing an academic project on dcentralized grid resource discovery. I need to evaluate(simulate) a request forwarding algorithm.I am planning for as many processes as i can with the available resources. I chose MPI coz it provided with facilities such as communicators and topology . Now i am learning MPI and almost about to complete.I heard of people doing simulations using MPI processes, perhaps with more nodes. can u suggest any alternative?
Any suggestions ,positive or negative are most welcome.
Regards,
Imran
Brian Barrett <brbarret_at_[hidden]> wrote:
On May 5, 2006, at 5:18 PM, imran shaik wrote:
> I am trying to launch as many MPI processes as possible to collect
> few performance statistics.
>
> How to launch many processes using lamboot.?
>
> I need around 250.
>
> I have three P4 machines with 256MB ram connected via hub.
With LAM/MPI, you can't do it. LAM/MPI was designed for HPC
applications running on small machines. HPC apps rarely run
oversubscribed, and only then by a couple nodes. LAM/MPI can start
about 60-70 processes / node, so that would give you 180 - 210
processes on your three machines. Of course, I can't see how you're
going to start that many processes on that small of a configuration,
but that's another story.
Brian
--
Brian Barrett
LAM/MPI developer and all around nice guy
Have a LAM/MPI day: http://www.lam-mpi.org/
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