Hi Jody Simple answer - the 1.2.x series does not support multiple hostfiles. I believe you will find that documented in the FAQ section.
What you have to do here is have -one- hostfile that includes all the hosts, and then -host each app-context to indicate which of those hosts are to be used for that specific app-context. Or you can just use -host for each app_context, with no hostfile specified. If you specify a hostfile and -host, then -all- the nodes listed in your -host's must be in the hostfile or we will error out. This will change in 1.3 where we will support a separate hostfile for each app_context, as well as one for the entire job, in combination with -host args as well. You can see that documented on the open-mpi wiki. Hope that helps Ralph On 4/10/08 4:40 AM, "jody" <jody....@gmail.com> wrote: > HI > In my network i have some 32 bit machines and some 64 bit machines. > With --host i successfully call my application: > mpirun -np 3 --host aim-plankton -x DISPLAY ./run_gdb.sh ./MPITest : > -np 3 --host aim-fanta4 -x DISPLAY ./run_gdb.sh ./MPITest64 > (MPITest64 has the same code as MPITest, but was compiled on the 64 > bit machine) > > But when i use hostfiles: > mpirun -np 3 --hostfile hosts32 -x DISPLAY ./run_gdb.sh ./MPITest : > -np 3 --hostfile hosts64 -x DISPLAY ./run_gdb.sh ./MPITest64 > all 6 processes are started on the 64 bit machine aim-fanta4. > > hosts32: > aim-plankton slots=3 > hosts64 > aim-fanta4 slots > > Is this a bug or a feature? ;) > > Jody > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
