[Beowulf] standards for GFLOPS / power consumption measurement?

Vincent Diepeveen diep at xs4all.nl
Tue May 10 05:37:05 PDT 2005

How do you categorize second hand bought systems?

I bought for 325 euro a third dual k7 mainboard + 2 processors. 

The rest i removed from old machines that get thrown away otherwise. 
Like 8GB harddisk. Amazingly biggest problem was getting a case to reduce
sound production :)

Network cards i got for free, very nice gesture from someone.

So when speaking of gflops per dollar at linpack, this will destroy of
course any record of $2500 currently, especially for applications needing
bandwidth to other processors, if i see what i paid for this self
constructed beowulf.

At 05:19 PM 5/9/2005 -0400, Douglas Eadline - ClusterWorld Magazine wrote:
>On Thu, 5 May 2005, Ted Matsumura wrote:
>> I've noted that the orionmulti web site specifies 230 Gflops peak, 110 
>> sustained, ~48% of peak with Linpack which works out to ~$909 / Gflop ?
>>  The Clusterworld value box with 8 Sempron 2500s specifies a peak Gflops
>> measuring CPU Ghz x 2 (1 - FADD, 1 FMUL), and comes out with a rating of
>> of peak using HPL @ ~ $140/Gflop (sustained?)
>It is hard to compare. I don't know what sustained or peak means in the
>context of their tests. There is the actual number (which I assume is
>sustained) then the theoretical peak (which I assume is peak).
>And our cost/Gflop does not take into consideration the construction 
>cost. In my opinion when reporting these type of numbers, there
>should be two categories "DIY/self assembled" and "turn-key". Clearly
>Kronos is DIY system and will always have an advantage of a 
>turnkey system.
>>  So what would the orionmulti measure out with HPL? What would the 
>> Clusterworld value box measure out with Linpack?
>Other benchmarks are here (including some NAS runs):
>>  Another line item spec I don't get is rocketcalc's ( 
>> http://www.rocketcalc.com/saturn_he.pdf )"Max Average Load" ?? What does 
>> this mean?? How do I replicate "Max Average Load" on other systems??
>>  I'm curious if one couldn't slightly up the budget for the clusterworld
>> to use higher speed procs or maybe dual procs per node and see some 
>> interesting value with regards to low $$/Gflop?? Also, the clusterworld
>> doesn't include the cost of the "found" utility rack, but does include the 
>> cost of the plastic node boxes. What's up with that??
>This was explained in the article. We assumed that shelving was optional 
>because others my wish to just put the cluster on existing shelves or 
>table top (or with enough Velcro strips and wire ties build a standalone 
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