Thanks Ralph,

        i found the mca parameter. It is btl_openib_max_btls which controls the available HCAs.

        Thanks for helping.

Regards

Neeraj Chourasia (MTS)
Computational Research Laboratories Ltd.
(A wholly Owned Subsidiary of TATA SONS Ltd)
B-101, ICC Trade Towers, Senapati Bapat Road
Pune 411016 (Mah) INDIA
(O) +91-20-6620 9863  (Fax) +91-20-6620 9862
M: +91.9225520634


Ralph Castain <rhc@open-mpi.org>
Sent by: users-bounces@open-mpi.org

07/15/2009 06:54 PM
Please respond to
Open MPI Users <users@open-mpi.org>
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Subject
Re: [OMPI users] selectively bind MPI to one HCA out of available        ones





Take a look at the output from "ompi_info --params btl openib" and you will see the available MCA params to direct the openib subsystem. I believe you will find that you can indeed specify the interface.
On Wed, Jul 15, 2009 at 7:15 AM, <neeraj@crlindia.com> wrote:

Hi all,

        I have a cluster where both HCA's of blade are active, but connected to different subnet.
        Is there an option in MPI to select one HCA out of available one's? I know it can be done by making changes in openmpi code, but i need clean interface like option during mpi launch time to select mthca0 or mthca1?

        Any help is appreciated. Btw i just checked Mvapich and feature is there inside.

Regards

Neeraj Chourasia (MTS)
Computational Research Laboratories Ltd.
(A wholly Owned Subsidiary of TATA SONS Ltd)
B-101, ICC Trade Towers, Senapati Bapat Road
Pune 411016 (Mah) INDIA
(O) +91-20-6620 9863  (Fax) +91-20-6620 9862
M: +91.9225520634

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