Date: Sat, 30 Nov 2002 14:39:12 -0800 From: Kent Stewart <kstewart@owt.com> To: Jens Rehsack <rehsack@liwing.de>, "Marc G. Fournier" <scrappy@hub.org> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: FreeBSD software to create "super computer" ? Message-ID: <200211301439.12732.kstewart@owt.com> In-Reply-To: <3DE91E1A.1070809@liwing.de> References: <20021130160800.U6214-100000@hub.org> <3DE91E1A.1070809@liwing.de>
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On Saturday 30 November 2002 12:22 pm, Jens Rehsack wrote: > Marc G. Fournier wrote: > > I'm really growing tired of reading articles talking abot so and > > so creating a super computer of 1400 CPUs running Linux ... > > latest one I read was one that HP setup ... > > > > ... is there software available for FreeBSD that can do this, or > > is this something we are being left behind in? > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-questions" in the body of the message > > Some, eg: > net/mpich: Message Passing Interface (MPI) Library > devel/distcc: Distribute compilation of C(++) code acrosss machines > on a network > > Depends on what you want to do. > You could also port beowulf :-) I thought at some point that beowulf was a port or would run on=20 FreeBSD but couldn't find it right now. Another one is=20 /usr/ports/net/pvm for Parallel Virtual Machine. It depends on how they did it. If you have 1400 cpus running 1400=20 copies of the OS, you haven't done much. What Cray (don't know what=20 their name is now) did was have 1 cpu run the OS and tell the other=20 1399 what to do. Cray in their large cpu machines used Alphas as=20 their cpus because they would run a program and duplicate output from=20 one of the mainframe Crays with 16-32 cpus. You sort of had one slug=20 and 1399 dragsters that only had computation on their minds.=20 A compiler that generates code for a pvm environment is something=20 else. Stacking up cpus is only a few % points in the process of=20 generating something useful. What I always wanted was something that=20 had 4 or 5 separate computers and would run something in 1/4 or 1/5=20 the time. What you usually see is something that will run 4 or 5 jobs=20 as truly parallel processes but all of them ran equally slowly. Sort=20 of like running seti on an SMP. A couple of years ago someone in one of the university computing=20 centers built a parallel system using FreeBSD. They had a web page=20 with images of their computer lab. I couldn't find the URL to it=20 right now.=20 A monte carlo program that I used in the past before I retired comes=20 with mods to run under pvm. You could start a job running and get=20 results on the same day instead of waiting 2 or 3 days for it to=20 finish. Kent --=20 Kent Stewart Richland, WA http://users.owt.com/kstewart/index.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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