> -----Original Message----- > From: users-boun...@open-mpi.org > [mailto:users-boun...@open-mpi.org] On Behalf Of semper > Sent: Thursday, April 20, 2006 9:50 PM > To: us...@open-mpi.org > Subject: Re: [OMPI users] OpenMPI and SLURM configuration ?? > > > No, the location of $HOME should not matter. > > > > What happens if you "mpirun -np 2 uptime"? (i.e., use > mpirun to launch > > a non-MPI application) > > it returns right result! but still only 2 local processes.
So this is *inside* a SLURM job? I.e., in "srun -N 2 -A"? What does "env | grep SLURM" show? Note that launching N processes on a single node is the default behavior for Open MPI if you don't specify a hostfile or no hosts are implicitly specified by a resource manager (e.g., you're running in a shell that is not under the control of SLURM). > I tried again to add a hostfile option "--hostfile > $HOME/openmpi/bin/hostfile" to > > mpirun, with the hostfile containning two items: IA64_node0 > and IA64_node1 ,but > this time it complained: > [time returned by IA64_node0] > bash line 1: orted : command not found As noted by someone else, you need to have Open MPI installed and available in your PATH on all nodes. See the FAQ: http://www.open-mpi.org/faq/?category=running > cluster. The 4 nodes can "ssh" or "rsh" login in each other > without password > prompt. When using SLURM, rsh/ssh are not used to startup jobs -- SLURM's native interface is used. -- Jeff Squyres Server Virtualization Business Unit Cisco Systems
