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 <r...@open-mpi.org> 
Sent by: users-boun...@open-mpi.org
07/15/2009 06:54 PM
Please respond to
Open MPI Users <us...@open-mpi.org>


To
Open MPI Users <us...@open-mpi.org>
cc

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, <nee...@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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