By default it will fail back to tcp,
You will get a bunch of message about not finding any hca's when you
are built with OpenIB and its not working.
You can also always force it to not look for openib
mpirun --mca btl ^openib app
Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
brockp_at_[hidden]
(734)936-1985
On Sep 10, 2008, at 9:08 PM, Christopher Tanner wrote:
> I compiled the Open MPI source with openib support. However, the
> Infiniband part is still not working right (I had to build it from
> source since I'm using Ubuntu, and it's a mess).
>
> If I execute 'mpirun', I assume it will automatically look to
> communicate using Infiniband. However, since Infiniband is not
> working, will Open MPI default back to using the standard ethernet
> connection or will it just not work at all? Is there a way to tell
> Open MPI to do so in some configuration file?
>
> Thanks.
>
> -------------------------------------------
> Chris Tanner
> Space Systems Design Lab
> Georgia Institute of Technology
> christopher.tanner_at_[hidden]
> -------------------------------------------
>
>
>
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>
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