which network are your VMs using for communications ? if this is tcp, then you also have to specify a restricted set of allowed ports for the tcp btl
that would be something like mpirun --mca btl_tcp_dynamic_ports 49990-50010 ... please double check the Open MPI 1.6.5 parameter and syntax with ompi_info --all (or check the archives, I think I posted the correct command line a few weeks ago) Cheers, Gilles On Wednesday, June 1, 2016, Ping Wang <ping.w...@asc-s.de> wrote: > I'm using Open MPI 1.6.5 to run OpenFOAM in parallel on several VMs on a > cloud. mpirun hangs without any error messages. I think this is a firewall > issue. Because when I open all the TCP ports(1-65535) in the security group > of VMs, mpirun works well. However I was suggested to open as less ports as > possible. So I have to limit MPI to run on a range of ports. I opened the > port range 49990-50010 for MPI communication. And use command > > > > mpirun --mca oob_tcp_dynamic_ports 49990-50010 -np 4 --hostfile machines > simpleFoam –parallel. > > > > But it still hangs. How can I specify a port range that OpenMPI will use? > I appreciate any help you can provide. > > > > Best, > > Ping Wang > > > > [image: ascs_logo_300dpi] > > *------------------------------------------------------* > > Ping Wang > > *Automotive Simulation Center Stuttgart e.V.* > > Nobelstraße 15 > > D-70569 Stuttgart > > Telefon: +49 711 699659-14 > > Fax: +49 711 699659-29 > > E-Mail: ping.w...@asc-s.de > <javascript:_e(%7B%7D,'cvml','ping.w...@asc-s.de');> > > Web: http://www.asc-s.de > > Social Media: [image: facebook]/asc.stuttgart > <http://www.facebook.com/asc.stuttgart> > > *------------------------------------------------------* > > > > >
