[Beowulf] Max flops to watts hardware for a cluster

Jim Lux james.p.lux at jpl.nasa.gov
Tue Feb 17 23:28:53 EST 2004


This kind of thing is way cool..
Have you published the algorithm behind the page in a concise form
somewhere?  It would be handy to be able to point mission/system planners to
it.

----- Original Message -----
From: "William Dieter" <dieter at engr.uky.edu>
To: <beowulf at scyld.com>
Sent: Tuesday, February 17, 2004 3:18 PM
Subject: Re: [Beowulf] Max flops to watts hardware for a cluster


> Try the cluster design tool at
> <http://cgi.aggregate.org/cgi-bin/cdr.cgi>.  You can enter your basic
> memory, memory bandwidth, etc requirements, then set the metric
> weighting to choose designs with the least power consumption first.
>
> For example, for the default requirements (minimal memory, disk, and
> network requirements, at least 50 GFLOPS, and a $10,000 budget), and
> weighting power consumption first then memory bandwidth, followed by
> GFLOPS I get the following as the best design:
>
> 23 Generic Fast Ethernet NIC   $8.00 $184.00
> 23 Cat5 Cable for Fast Ethernet   $2.00 $46.00
> 1 Generic 24 Port Fast Ethernet Switch $76.00 $76.00
> 23 Pentium 4 2.4GHz $166.00 $3818.00
> 23 Generic Socket 478 $56.00 $1288.00
> 69 Generic PC3200 256MB DDR $44.00 $3036.00
> 23 Generic Mid-Tower Case $50.00 $1150.00
> 3 Generic 2x2 Shelving Unit with Wheels $50.00 $150.00
> Total $9748.00
>
> The above design gets you 50 GFLOPS and 2.67 bytes/FLOP for about 30
> Amps (you get to convert Amps to Watts.)  Everything else in the design
> is pretty minimal, but you can adjust the requirements on the form to
> get what you need (or if you can't let me know why not :-)
>
> The CGI tries all designs with the parts in its database to find the
> ones that meet your requirements and metric weighting.  The model
> includes current consumption for switches and compute nodes based on
> the power supply.  The parts database is a bit out of date right now...
>
> let me know what you think.
>
> Bill Dieter.
> dieter at engr.uky.edu
>
> On Tuesday, February 17, 2004, at 12:01 PM, Camm Maguire wrote:
> > Greetings, and thanks for the fascinating discussion!
> >
> > I'm mostly interested in dram flops, and also not the absolute
> > maximum, mars-rover level technology, but say within 10% of the best
> > available options on a more or less commodity basis.
> >
> > Take care,
> >
> > Mark Hahn <hahn at physics.mcmaster.ca> writes:
> >
> >>> Greetings!  The subject line says it all -- where can one get the
> >>> most
> >>> bang per watt among systems currently available?
> >>
> >> depends on which kind of flops: cache-friendly or dram-oriented?
>
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