There are no firewalls by default. I can ssh between both nodes without a password so I assumed that all is good with the comms.I can also get both nodes to participate in the ring program at the same time.Its just that I am limited to inly 2 processes if they are split between the nodes
ie:mpirun -H A,B ring (works)mpirun -H A,A,A,A,A,A,A ring (works)mpirun -H B,B,B,B ring (works)mpirun -H A,B,A ring (hangs)
--- On Tue, 12/7/11, Jeff Squyres <jsquyres_at_[hidden]> wrote:
From: Jeff Squyres <jsquyres_at_[hidden]>
Subject: Re: [OMPI users] Mpirun only works when n< 3
To: randolph_pullen_at_[hidden], "Open MPI Users" <users_at_[hidden]>
Received: Tuesday, 12 July, 2011, 12:21 AM
Have you disabled firewalls between your compute nodes?
On Jul 11, 2011, at 9:34 AM, Randolph Pullen wrote:
> This appears to be similar to the problem described in:
> However, those fixes do not work for me.
> I am running on an
> - i5 sandy bridge under Ubuntu 10.10 8 G RAM
> - Kernel 126.96.36.199 with OpenVZ tweaks
> - OpenMPI V 1.4.1
> I am trying to migrate existing software to a new cluster (A,B)
> I can run the ring demo on a single machine, either A or B with any number of processes.
> But when I combine the 2 machines I am limited to 2 processes, any more and MPI hangs. It gets as far as:
> Process 0 sending 10 to 1, tag 201 (3 processes in ring)
> Process 0 sent to 1
> and there it stays...
> Any help greatly appreciated.
> users mailing list
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