[gmx-users] Gromacs on SCI interconnected clusters

[Ole W. Saastad]

Gromacs is an application that is strongly dependent on the
MPI and interconnect performance. 

This has been verified on the Gromacs benchmark pages where
the scaling when running on a cluster with ethernet is not 
very good. It is very good when run on a cluster with 
ScaMPI and SCI. The cpu efficiency is over 90% at 16 cpus
when using SCI but only 54% when using ethernet.

Please see the hard facts at :

http://www.gromacs.org/benchmarks/scaling.php

-- 
Ole W. Saastad, Dr.Scient.
Scali AS P.O.Box 70 Bogerud 0621 Oslo NORWAY 
Tel:+47 22 62 89 68(dir) mailto:ole at scali.no http://www.scali.com 
ScaMPI: bandwidth .gt. 300 MB/sec. latency .lt. 4 us.