Hi Tetsuya Mishima In your example, have you tried not to modify the node file, launch two mpi processes with mpiexec, and request a "-bynode" distribution of processes:
mpiexec -bynode -np 2 ./my_program This should launch one MPI process in each of two nodes. See 'man mpiexec' for details. Works in OMPI 1.6. I don't know about OMPI 1.7. You can continue to ask for two nodes with four processors/cores each in your Torque script, say: #PBS -l nodes=2:ppn=4 to use the remaining cores for the OpenMP threads. I hope this helps, Gus Correa On Mar 17, 2013, at 8:52 PM, tmish...@jcity.maeda.co.jp wrote: > > Hi openmpi developers, > > I have been evaluating our FEM aplication with new openmpi-1.7rc7 under > Torque job controler. > > Now I encountered a trouble that "-hostfile" does not work properly. > Since my application is hybrid(MPI+OpenMP), I have to modify > $PBS_NODEFILE and use "-hostfile". > > I don't add new hosts to the hostfile according to FAQ. It's just a > subset of the hosts allocated to the Torque. At leaset, this method > works well with openmpi-1.6.x. > > I hope this issue will be fixed in the next release of openmpi-1.7. > > Best Regards, > Tetsuya Mishima > > (1) Example of 2MPI having 4 threads: > $PBS_NODEFILE -> modified hostfile > node01 node01 > node01 node02 > node01 > node01 > node02 > node02 > node02 > node02 > > (2) The error message I got is as follows: > -------------------------------------------------------------------------- > A hostfile was provided that contains at least one node not > present in the allocation: > > hostfile: pbs_hosts > node: node01 > > If you are operating in a resource-managed environment, then only > nodes that are in the allocation can be used in the hostfile. You > may find relative node syntax to be a useful alternative to > specifying absolute node names see the orte_hosts man page for > further information. > -------------------------------------------------------------------------- > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
