Re: [OMPI users] problem using mpirun over multiple nodes

2011-05-26 Thread Jagannath Mondal
Hi Jeff, Thanks to you, I figured the problem . As you suspected, it was iptables which was acting as firewalls in some machines. So, after I stopped the iptable, the MPI communication is going fine. Even I tried with 5 machines together and the communication is going allright. Thanks again, Jag

Re: [OMPI users] problem using mpirun over multiple nodes

2011-05-26 Thread Jeff Squyres
ssh may be allowed but other random TCP ports may not. iptables is the typical firewall software that most Linux installations use; it may have been enabled by default. I'm a little doubtful that this is your problem, though, because you're apparently able to *launch* your application, which me

Re: [OMPI users] problem using mpirun over multiple nodes

2011-05-26 Thread Jagannath Mondal
Hi Jeff, I was wondering how I can check whether there is any firewall software . In fact I can use ssh to go from one machine to another . But, only with mpirun , it does not work. I was wondering whether it is possible that even in presence of firewall ssh may work but mpirun may not. Jaganna

Re: [OMPI users] problem using mpirun over multiple nodes

2011-05-25 Thread Jeff Squyres (jsquyres)
Are you running any firewall software? Sent from my phone. No type good. On May 25, 2011, at 10:41 PM, "Jagannath Mondal" wrote: > Hi, > I am having a problem in running mpirun over multiple nodes. > To run a job over two 8-core processors, I generated a hostfile as follows: > yethiraj30