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Subject: Re: [OMPI users] quadrics support?
From: Ashley Pittman (ashley_at_[hidden])
Date: 2009-07-08 15:33:01

On Wed, 2009-07-08 at 15:09 -0400, Michael Di Domenico wrote:
> On Wed, Jul 8, 2009 at 12:33 PM, Ashley Pittman<ashley_at_[hidden]> wrote:
> > Is the machine configured correctly to allow non OpenMPI QsNet programs
> > to run, for example tping?
> >
> > Which resource manager are you running, I think slurm compiled for RMS
> > is essential.
> I can ping via TCP/IP using the eip0 ports.
> When i run tping i get:
> ELAN_EXCEOPTIOn @ --: 6 (Initialization error)
> elan_init: Can't get capability from environment
> I am not using slurm or RMS at all, just trying to get openmpi to run
> between two nodes.

To attach to the elan a process has to have a "capability" which is a
kernel attribute describing the size (number of nodes/ranks) of the job,
without this you'll get errors like the one from tping. The only way to
generate these capabilities is by using RMS, Slurm or I believe pdsh
which can generate one and push it into the kernel before calling fork()
to create the user application.


Ashley Pittman, Bath, UK.
Padb - A parallel job inspection tool for cluster computing