[mvapich-discuss] use of parallel ib and ethernet interfaces

[Sayantan Sur]

On Tue, Feb 1, 2011 at 2:09 PM, Pavan Balaji <balaji at mcs.anl.gov> wrote:
>
> On 02/01/2011 12:24 PM, Sayantan Sur wrote:
>>
>> In the future, we may look into providing support for multiple
>> interfaces simultaneously (through same binary). However, the MPICH2
>> framework currently does not support this.
>
> FYI, MPICH2 does allow multiple networks to be used within Nemesis.
>

Thanks for the information, Pavan. We verified that this is working
with Nemesis.

Michael, David - Here are the instructions on how to configure
MVAPICH2 in order to use different networks (ib and tcp) from within
the same binary.

Configuring MVAPICH2:

$ ./configure --with-device=ch3:nemesis:ib,tcp
...
$ mpiexec.hydra -f hosts ./osu_latency -n 2
... runs with ib ...
$ MPICH_NEMESIS_NETMOD=tcp mpiexec.hydra -f hosts ./osu_latency -n 2
... runs with tcp ...


Thanks.

>  -- Pavan
>
> --
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji
>
>



-- 
Sayantan Sur

Research Scientist
Department of Computer Science
http://www.cse.ohio-state.edu/~surs