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From: Brian Barrett (bbarrett_at_[hidden])
Date: 2007-07-04 23:34:52

On Jul 4, 2007, at 8:21 PM, Graham Jenkins wrote:

> I'm using the openmpi-1.1.1-5.el5.x86_64 RPM on a Scientific Linux 5
> cluster, with no installed HCAs. And a simple MPI job submitted to
> that
> cluster runs OK .. except that it issues messages for each node
> like the
> one shown below. Is there some way I can supress these, perhaps by an
> appropriate entry in /etc/openmpi-mca-params.conf ?
> --
> libibverbs: Fatal: couldn't open sysfs class 'infiniband_verbs'.
> ----------------------------------------------------------------------
> ----
> [0,1,0]: OpenIB on host localhost was unable to find any HCAs.
> Another transport will be used instead, although this may result in
> lower performance.

Yes, there is a line you can add to /etc/openmpi-mca-params.conf:


will tell Open MPI to use any available btls (our network transport
layer) except openib.

Hope this helps,


   Brian W. Barrett
   Networking Team, CCS-1
   Los Alamos National Laboratory