On May 12, 2011, at 9:53 PM, Rodrigo Silva Oliveira wrote: > Hi there. > > I'm developing a distributed system with a communication layer based on Open > MPI. As part of my project, I have to create a process scheduler. So I > decided to use the MPI_Spawn function to dynamically create (it is an > requirement of the system) the process across the cluster's nodes. > > Is there some way to specify how many copies of a process to spawn to each > node? For instance, I want to spawn 5 copies of a mpi program to 3 nodes usin > the scheme bellow: > > 1 to host 1 > 3 to host 2 > 1 to host 3 > > obs.: I am using openmpi-1.5.3. The default policies provided by the ompi is > not applicable to my problem because I will decide the scheme based on > specific criteria.
Use the "host" info key. You would specify your dynamic spawn as three apps, each running the same executable. It's the equivalent of mpirun -n 1 -host host1 app : -n 3 -host host2 app : -n 1 -host host3 app > > Thanks in advance. > > -- > Rodrigo Silva Oliveira > M.Sc. Student - Computer Science > Universidade Federal de Minas Gerais > www.dcc.ufmg.br/~rsilva > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
