[mvapich-discuss] Is there any way to use mvapich2 on cluster without ib?

[Brock Palen]

Actually I take back what I said, (sorry only have used mvapich on ib machines)

>From the page:
http://mvapich.cse.ohio-state.edu/overview/mvapich2/

TCP/IP-Nemesis: The standard TCP/IP interface (provided by MPICH2 Nemesis channel) to work with a range of network adapters supporting TCP/IP interface. This interface can be used with IPoIB (TCP/IP over InfiniBand network) support of InfiniBand also. However, it will not deliver good performance/ scalability as compared to the other interfaces.

It looks like they have nemesis left in mvapich2 which should let you use TCP networks.  So I stand corrected. 

Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
brockp at umich.edu
(734)936-1985



On Aug 18, 2011, at 2:32 PM, teng ma wrote:

> So mvapich2's tcp/ip communication is completely the same with MPICH2 including collective communication? Is this correct?
> 
> Teng
> 
> On Thu, Aug 18, 2011 at 2:27 PM, Brock Palen <brockp at umich.edu> wrote:
> Teng,
> 
> Why not just build mpich2 ?  My understanding is mvapich is mpich2 heavily modified and optimized for verbs/psm etc.
> 
> I don't think the mvapich guys even if TCP/IP worked optimize for it.
> 
> Brock Palen
> www.umich.edu/~brockp
> Center for Advanced Computing
> brockp at umich.edu
> (734)936-1985
> 
> 
> 
> On Aug 18, 2011, at 2:14 PM, teng ma wrote:
> 
> > e.g. ethernet cluster.    I can configure and compile mvapich2-1.7rc on a cluster without librdmacm.so.1
> > But when mpirun_rsh,  It complains about lacking librdmacm.so.1.
> >
> > Is there any option in configure to disable ib compiling in mvapich2?
> >
> > Teng
> > _______________________________________________
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> > mvapich-discuss at cse.ohio-state.edu
> > http://mail.cse.ohio-state.edu/mailman/listinfo/mvapich-discuss
> 
>