Re: NAMD performance with 10GbE interconnect

From: Axel Kohlmeyer (akohlmey_at_gmail.com)
Date: Tue Aug 11 2009 - 11:25:25 CDT

On Fri, Aug 7, 2009 at 4:02 PM, Prakash
Velayutham<Prakash.velayutham_at_cchmc.org> wrote:
> Hello,
>
> Does anyone here use 10GbE interconnect between compute nodes to run NAMD
> jobs? What kind of performance improvements can be expected compared to a
> Gig ethernet network?

the improvements should be very little. your main problem are the
latencies introduced
by the TCP/IP protocol. current myrinet is also using 10GigE fabric
but uses special
switches and an MPI library that bypasses the TCP/IP layer.

cheers,
   axel.
>
> Thanks,
> Prakash
>
>

-- 
Dr. Axel Kohlmeyer    akohlmey_at_gmail.com
Institute for Computational Molecular Science
College of Science and Technology
Temple University, Philadelphia PA, USA.

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