: users-boun...@open-mpi.org [mailto:users-boun...@open-mpi.org] On Behalf
Of Ralph Castain
Sent: Tuesday, September 20, 2011 6:55 PM
To: Open MPI Users
Subject: Re: [OMPI users] Large TCP cluster timeout issue
Truly am sorry about that - we were just talking today about the need to update
an
e. Anyway, if I get access to another large TCP
> cluster, I’ll give it a try.
>
> Thanks,
>
> brent
>
> From: users-boun...@open-mpi.org [mailto:users-boun...@open-mpi.org] On
> Behalf Of Ralph Castain
> Sent: Tuesday, September 20, 2011 4:15 PM
> To: Open MPI U
ther large TCP cluster, I'll
give it a try.
Thanks,
brent
From: users-boun...@open-mpi.org [mailto:users-boun...@open-mpi.org] On Behalf
Of Ralph Castain
Sent: Tuesday, September 20, 2011 4:15 PM
To: Open MPI Users
Subject: Re: [OMPI users] Large TCP cluster timeout issue
Hmmmper
Hmmmperhaps you didn't notice the mpi_preconnect_all option? It does
precisely what you described - it pushes zero-byte messages around a ring to
force all the connections open at MPI_Init.
On Sep 20, 2011, at 3:06 PM, Henderson, Brent wrote:
> I recently had access to a 200+ node Magny Co
I recently had access to a 200+ node Magny Cours (24 ranks/host) 10G Linux
cluster. I was able to use OpenMPI v1.5.4 with hello world, IMB and HPCC, but
there were a couple of issues along the way. After setting some system
tunables up a little bit on all of the nodes a hello_world program wor
