[gmx-users] Mac OS X cluster system

David spoel at xray.bmc.uu.se
Mon Dec 16 17:56:50 CET 2002

On Mon, 2002-12-16 at 17:34, Taeho Kim wrote:
> Hi all,
> I am just wondering whether any one has experienced on Mac OS X  system, especially MPI parallel. 
> http://www.gromacs.org/benchmarks/single.php
> Where can I find( or make) "PPC version of LAM-mpi" as mentioned in the above link? 
> I got the results on 2-node Mac cluster(2 machines), but it is not impressive at all. 
> (My systems: Gromacs-3.1.5_pre1, fftw-2.1.3, MPICH, two-Mac 1.0 G, OS X 10.2, )
>  It took the same amount of time on two-node Mac-cluster as that on a single machine. The above link mentioned the Mac cluster could be "significantly slower" via TCP/IP.   Is there any ways to improve the speed of simulation on multiple nodes of Mac system? 
Checkout www.lam-mpi.org

if you use the magic options to improve tcp (see mailing list) it should
scale decently for large systems.
> Thanks,
> Taeho
Groeten, David.
Dr. David van der Spoel, 	Biomedical center, Dept. of Biochemistry
Husargatan 3, Box 576,  	75123 Uppsala, Sweden
phone:	46 18 471 4205		fax: 46 18 511 755
spoel at xray.bmc.uu.se	spoel at gromacs.org   http://xray.bmc.uu.se/~spoel

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