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Subject: Re: [OMPI users] selectively bind MPI to one HCA out of available ones
From: neeraj_at_[hidden]
Date: 2009-07-15 09:33:41


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_at_[hidden]>
Sent by: users-bounces_at_[hidden]
07/15/2009 06:54 PM
Please respond to
Open MPI Users <users_at_[hidden]>

To
Open MPI Users <users_at_[hidden]>
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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_at_[hidden]> 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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