> On Jun 22, 2018, at 7:31 PM, Gilles Gouaillardet > <gilles.gouaillar...@gmail.com> wrote: > > Carlos, > > By any chance, could > > mpirun—mca oob_tcp_if_exclude 192.168.100.0/24 <http://192.168.100.0/24> ... > > work for you ? > > Which Open MPI version are you running ? > > > IIRC, subnets are internally translated to interfaces, so that might be an > issue if > the translation if made on the first host, and then the interface name is > sent to the other hosts.
FWIW: we never send interface names to other hosts - just dot addresses > > Cheers, > > Gilles > > On Saturday, June 23, 2018, carlos aguni <aguni...@gmail.com > <mailto:aguni...@gmail.com>> wrote: > Hi all, > > I'm trying to run a code on 2 machines that has at least 2 network interfaces > in it. > So I have them as described below: > > compute01 > compute02 > ens3 > 192.168.100.104/24 <http://192.168.100.104/24> > 10.0.0.227/24 <http://10.0.0.227/24> > ens8 > 10.0.0.228/24 <http://10.0.0.228/24> > 172.21.1.128/24 <http://172.21.1.128/24> > ens9 > 172.21.1.155/24 <http://172.21.1.155/24> > --- > > Issue is. When I execute `mpirun -n 2 -host compute01,compute02 hostname` on > them what I get is the correct output after a very long delay.. > > What I've read so far is that OpenMPI performs a greedy algorithm on each > interface that timeouts if it doesn't find the desired IP. > Then I saw here (https://www.open-mpi.org/faq/?category=tcp#tcp-selection > <https://www.open-mpi.org/faq/?category=tcp#tcp-selection>) that I can run > commands like: > `$ mpirun -n 2 --mca oob_tcp_if_include 10.0.0.0/24 <http://10.0.0.0/24> -n 2 > -host compute01,compute02 hosname` > But this configuration doesn't reach the other host(s). > In the end I sometimes I get the same timeout. > > So is there a way to let it to use the system's default route? > > Regards, > Carlos. > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/users
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