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Subject: math mistake

Author: Vincent Diepeveen

Date: 19:00:08 01/10/02

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On January 10, 2002 at 08:12:32, Gian-Carlo Pascutto wrote:

>On January 10, 2002 at 08:03:50, Gian-Carlo Pascutto wrote:
>
>>On January 10, 2002 at 07:48:26, Ed Schröder wrote:
>>
>>>http://www.cnn.com/2001/TECH/industry/12/24/ibm.bluestorm.idg/index.html
>>>
>>>For the record, Blue Storm will contain 1.5PB (petabytes) of data by 2004, equal
>>>to 75,000 20GB PCs. And it will crunch 20 trillion calculations per second,
>>>meaning that if this reporter used a hand-held calculator to race Blue Storm to
>>>20 trillion calculations, I would be running behind by 17 million years,
>>>according to IBM.
>>>
>>>Also, chess players be warned, Blue Storm at its apex, will be 1,700 times
>>>faster than Deep Blue, the super computer that beat chess champion Garry
>>>Kasparov, IBM officials said.
>>>
>>>============
>>>
>>>I am sold, have ordered the thing with my VISA card.
>>>
>>>Anxious waiting for delivery, start porting Rebel, increase the maximum depth to
>>>256 ply. The end of computer chess.
>>The Blue Strom will run at
>>
>>6 088 280 061 nodes per second
>
>If we use the '1700 times faster than DB' number, we arrive
>at
>
>250M x 1700 = 425 000 000 000 nodes/s
>
>76 500 000 000 000 nodes per move
>
>Again assuming a branching factor of 4 (This was the case for DB IIRC)
>
>we get...(drums rolling again)...23 ply
>
>--
>GCP

Your drums forgot one thing. It is a cluster, not a shared memory
machine. So expect a speedup of like 2.0 or something out of n processors.





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