>2 p4 processor systems

[Joel Jaeggli]

On Thu, 29 Aug 2002, Steve Cousins wrote:

> 
> > > If the machines that you are talking about really are 6-Way SMP nodes,
> > > what are they?
> > 
> > afaikt, these are machines based on the serverworks HE chipset.
> 
> I just got an email from the original poster and he says that the machine
> his management people were thinking of was in fact the Western Scientific
> machine which has three dual-CPU nodes, complete with three disks, and six
> 10/100 interfaces in 1U.  
> 
> Has anyone made a cluster with these?  If so, how bad is the heat
> problem? Anyone have a real price for these?

6 x ~30watts (1ghz piii tulatin) = 180 watts... bad but not out of
control. modula the fact that three mainboards probably have more crap
sticking off them to interfere with airflow than one mainboard.

joelja
 
> Steve
> _____________________________________________________________
>  Steve Cousins                 Email: cousins at umit.maine.edu
>  Research Associate            Phone: (207) 581-4302
>  Ocean Modeling Group
>  School of Marine Sciences     208 Libby Hall
>  University of Maine           Orono, Maine 04469
> 
> 
> 
> > serverworks has a very sparse/messy/wrong website, but on
> > 	http://www.serverworks.com/products/matrix.html
> > they claim to support 6 PIII's.  they also claim to provide 
> > 4.1 GB/s, but I think that's merely a marketroid's dream:
> > I'm guessing all 6 CPUs are on 1 or two FSB100 or 133 bus(es),
> > and therefore you're only ever going to see about 1 GB/s.
> > 
> > 6 is such an odd number (pardon) - I wonder if it's the Intel (Corrolary)
> > Profusion chipset, which actually goes up to 8 PIII's.  again, the 
> > CPUs are going to be crammed onto a pitifully slow shared FSB,
> > and performance is going to hurt.
> > 
> > HP apparently made boxes with both approaches.  the NetServer LH6000
> > seems to have been the wacky SW-HE chipset.  it's DEFINITELY not 1U,
> > though, or even close.
> > 
> > in short, these big-way PIII SMP machines seem to be based on the 
> > premise that your application will fit entirely in the large private
> > caches that PIII/xeons had, and that your main performance criterion
> > is to stick lots of nics in lots of separate PCI buses with lots 
> > of disks.  in short, the CPU doesn't do much except route DMAs,
> > and you're willing to pay big for an impressive box.
> > 
> > pretty much the antithesis of beowulf, I'd say ;)
> 
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Joel Jaeggli	      Academic User Services   joelja at darkwing.uoregon.edu    
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