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
bro...@umich.edu
(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.tan...@gatech.edu
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