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Subject: Re: [OMPI users] using ompi-server on a single node
From: Ralph Castain (rhc_at_[hidden])
Date: 2009-01-05 09:25:36


It is currently a known limitation - shared memory currently only
works between procs from the same job. There is an enhancement coming
that will remove this restriction, but it won't be out for some time.

Ralph

On Jan 5, 2009, at 1:06 AM, Thomas Ropars wrote:

> Hi,
>
> I've tried to use ompi-server to connect 2 processes belonging to
> different jobs but running on the same computer. It works when the
> computer has a network interface up. But if the only active network
> interface is the local loop, it doesn't work.
>
> According to what I understood reading the code, it is because no btl
> component can be used in this case. "tcp" is not used because usually
> it is the "sm" component that is used for processes on the same host.
> But in that case it doesn't work because "sm" is supposed to work only
> for processes of the same job.
>
> I know that this use-case is not very frequent :)
> But Is there a solution to make it work ? or is it a known
> limitation ?
>
> Regards
>
> Thomas
>
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