Beowulf with Gigabit Ethernet
Bogdan Costescu
bogdan.costescu at iwr.uni-heidelberg.de
Fri Jan 11 11:44:54 PST 2002
On Fri, 11 Jan 2002 alex at compusys.co.uk wrote:
> I think that in general point to point performance information has a
> limited value, whatever vendors might quote on their web-page. SCI might
> be performing pretty well if it comes down to just latency and bandwidth
> between two machines, but it is a ring topology. If you have
> more machines on a ring they will share that same bandwidth.
As with all generalizations when it comes to parallel performance, there
are cases when actually a ring topology (or 3D torus) does give results:
when communication is done only between neighbours. CHARMM (as it was
recently mentioned on this list) can benefit from such setup; an example
can be found at:
http://arg.cmm.ki.si/vrana/
--
Bogdan Costescu
IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen
Universitaet Heidelberg, INF 368, D-69120 Heidelberg, GERMANY
Telephone: +49 6221 54 8869, Telefax: +49 6221 54 8868
E-mail: Bogdan.Costescu at IWR.Uni-Heidelberg.De
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