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Subject: Re: Generating endgame tablebases

Author: Robert Hyatt

Date: 08:23:38 10/11/01

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On October 11, 2001 at 00:43:57, Slater Wold wrote:

>On October 11, 2001 at 00:27:17, Robert Hyatt wrote:
>
>>On October 10, 2001 at 22:55:27, Slater Wold wrote:
>>
>>>On October 10, 2001 at 22:36:01, Robert Hyatt wrote:
>>>
>>>>On October 10, 2001 at 16:55:16, Olaf Jenkner wrote:
>>>>
>>>>>>Some took hours on a Cray (Stiller).  Figure months on a PC for those.
>>>>>>No idea how long the really bad ones will take (kppkpp for example.)
>>>>>>The promotion cases will certainly take a _long_ while...
>>>>>
>>>>>Didn't use Stiller the connection machine?
>>>>>I remember that I read 1991 about this.
>>>>>
>>>>>OJe
>>>>
>>>>
>>>>He used both.  Burton Wendroff/Tony Warnock got him some time on a C90
>>>>sometime in the 1993 time frame...  The advantage of the C90 is that it
>>>>comes with 32 gigabytes of RAM, which was helpful for making the generator
>>>>run very fast...  Of course, he didn't do any compression, and he couldn't
>>>>write the files out to anything for saving them...  but he did compute some
>>>>statistics about them before chucking them.
>>>
>>>Any idea where to get those statistics Bob?
>>
>>
>>I believe Lewis published some of them quite some while back.  But the
>>thing he published was mainly "deepest mate" and the like.  I didn't follow
>>this very closely, and only remember Wendroff asking for "my contact" up at
>>Cray in trying to set the time up...
>
>Ok.  Thanks.
>
>>
>>
>>
>>
>>>
>>>Who is compiling them now?
>>
>>Only Eugene so far as I know...
>
>On what?  And how is he doing the 6 pieces?  I thought you needed a 64-bit OS
>and a LOT of memory and HD space.


Last I heard he was using some "unused" alphas at microsoft.  Since MS
no longer supports the alpha with NT, the machines were free and he
grabbed them. :)



>
>>
>>
>>
>>>
>>>How hard is it to get time on a Cray?
>>>
>>
>>Have you noticed a "lack" of "cray blitz"?  Draw your own conclusion.  :)
>
>Well, it was running at one time!  What's the difference between then and now!?!


we could get time to play in one tournament a year.  Maybe a few nights of
testing between 1am and 5am if we were lucky.




>
>>
>>The machines sell for $60,000,000.00 or so.  So yes, it takes a lot of
>>haggling to get time...
>
>Jeez....
>
>>
>>At one time CPU time was going for $20,000 per hour...
>
>Man oh man.  I went looking up Cray's, (other than www.cray.com) and all I could
>find was crap about Cray, Inc. suing the United States of America.  (The CIA was
>one of the organizations involved.)
>


Not sure what that is about.  The US Government (the NSA and other "black"
agencies as well) are their best customers.  NSA has a "cluster" of crays
if you can call that a "cluster".  :)




>So renting one for a day is pretty much outta the question for me.....as I don't
>have $480,000 to blow.
>
>What a shame.
>
>>
>>
>>
>>
>>
>>
>>>
>>>
>>>Slate



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