Try this FAQ entry: http://www.open-mpi.org/faq/?category=running#diagnose-multi-host-problems
On Mar 25, 2014, at 6:54 AM, "Wang,Yanfei(SYS)" <wangyanfe...@baidu.com> wrote: > Hi, > > I am a fresh learner of OpenMPI programmer, and have some troubles on > building mpi programming, hope some helps.. > > The example/helloc_c can works successfully with 2 process on local machine, > however, do not work on two separate physical node. > > Physical two nodes: > Eg: > [root@bb-nsi-ib04 examples]# mpirun -hostfile hosts -np 2 hello_c > The command just return instantly without nothing printed. > Local machine: > [root@bb-nsi-ib04 examples]# mpirun -np 2 hello_c > Hello, world, I am 0 of 2, (Open MPI v1.7.5, package: Open MPI > root@bb-nsi-ib04.bb01.*.com Distribution, ident: 1.7.5, Mar 20, 2014, 108) > Hello, world, I am 1 of 2, (Open MPI v1.7.5, package: Open MPI > root@bb-nsi-ib04.bb01.*.com Distribution, ident: 1.7.5, Mar 20, 2014, 108) > [root@bb-nsi-ib04 examples]# > -----peer machine is ok-------- > [root@bb-nsi-ib03 examples]# mpirun -np 2 hello_c > Hello, world, I am 0 of 2, (Open MPI v1.7.5, package: Open MPI > root@bb-nsi-ib03.bb01.*.com Distribution, ident: 1.7.5, Mar 20, 2014, 108) > Hello, world, I am 1 of 2, (Open MPI v1.7.5, package: Open MPI > root@bb-nsi-ib03.bb01.*.com Distribution, ident: 1.7.5, Mar 20, 2014, 108) > [root@bb-nsi-ib03 examples]# > the command run successfully, and print two message!! > > Configuration details: > OpenMPI version: 1.7.5 > Hostfile: > [root@bb-nsi-ib04 examples]# cat hosts > ib03 slots=1 > ib04 slots=1 > [root@bb-nsi-ib04 examples]# > /etc/hosts: > [root@bb-nsi-ib04 examples]# cat /etc/hosts > 192.168.71.3 ib03 > 192.168.71.4 ib04 > SSH: > Public rsa key is redistributed two machine, ib03 and ib04, and to do ssh > login in without password is ok, I am sure. > > I am confused about this trouble, and anyone can help us? It have nothing > log and error tip, could anyone tell me how to do diagnose it. > > BR > > Yanfei Wang > > > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2014/03/14385.php -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
