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Subject: Re: Beowulf Crafty

Author: Eugene Nalimov

Date: 17:19:56 05/17/00

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On May 17, 2000 at 20:15:01, Robert Hyatt wrote:

>On May 17, 2000 at 18:20:38, Pete Galati wrote:
>
>>On May 17, 2000 at 18:03:46, Robert Hyatt wrote:
>>
>>>On May 17, 2000 at 15:33:13, Peter Hegger wrote:
>>>
>>>>Hello
>>>>Bob, I was wondering how many nps you will expect to hit when you get crafty up
>>>>and running on the Beowulf cluster.
>>>>Have you an approximate time frame when you think you may have the beast going?
>>>>Or, is that something that is unpredictable at this point?
>>>>Thanks,
>>>>Peter
>>>
>>>
>>>It is unpredictable.  There are lots of things to do... but obviously it
>>>ought to hit 10M nodes per second.  Whether that is 10x faster than my
>>>normal search on a single quad is very doubtful.  But I don't think that
>>>hoping for 50% efficiency is out of line... which means an effective speed
>>>of 5M.  And this is based on the current cluster.  Another 8 quad xeons are
>>>due in this Summer, for a total of 18.  That just might really hit 10M useful
>>>nodes per second.
>>>
>>>But lots of things are left to play with, like shared vs local transposition
>>>tables, carefully scheduling positions on nodes that have seen them before,
>>>etc...
>>
>>Just curiuous, have other programs used Beowulf clusters yet?
>>
>>Will someone with too much money in the future be able to buy a Beowulf cluster
>>and compile a BeoCrafty from the same source as the rest of us poor folks use
>>for our humble PCs?
>>
>>Pete
>
>Probably.  I would hope that the beowulf version would work well on a two node
>machine (ie two PII/500's sitting side by side with a 100baseTx connection
>between them.)  But once that is public, doing the same with 32 quad xeons
>will be just as easy, although I don't know how efficient it will be.

It would be interesting to run it in our SQL lab :-)

Eugene



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