Hi Ashley, You nailed it precisely. I turned dasher's firewall off per your instruction and the problem went away.
[tsakai@dasher Rmpi]$ cat app.ac3 -H dasher.egcrc.org -np 1 hostname -H dasher.egcrc.org -np 1 hostname -H vixen.egcrc.org -np 1 hostname -H vixen.egcrc.org -np 1 hostname [tsakai@dasher Rmpi]$ [tsakai@dasher Rmpi]$ mpirun -app app.ac3 dasher.egcrc.org dasher.egcrc.org vixen.egcrc.org vixen.egcrc.org [tsakai@dasher Rmpi]$ Incidentally, all machines we have are inside the firewall and none is publicly reachable without the use of vpn. Many thanks to you. Also, thanks to Reuti who raised this possibility in the first place. Regards, Tena On 2/14/11 1:37 PM, "Ashley Pittman" <ash...@pittman.co.uk> wrote: > > On 14 Feb 2011, at 21:10, Tena Sakai wrote: >> Regarding firewall, they are different: > >> >> I don't understand what they mean. > > vixen has a normal, or empty config and as such has no firewall, dasher has a > number of firewall rules configured which could easily be the cause of the > problem on these two machines. To be able to run OpenMPI across these two > machines you'll need to disable the firewall on dasher. > > To disable the firewall the command (as root) is "service iptables off" to > turn it off until next boot or "chkconfig iptables off" to do it permanently > from the next boot, obviously you should check with your network administrator > before doing this. > > Ashley.
