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Subject: Re: Question to people who generate 6-men-tablebases

Author: Vincent Diepeveen

Date: 16:07:27 09/08/02

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On September 08, 2002 at 13:32:31, Olaf Jenkner wrote:

In fact EGTB generation is ideal for clusters with big bandwidth.
question is whether anyone will write it. All i have to do is
start another thread for generating and divide the indices.

like thread A generates indices 0..n/2 and B generates n/2+1 .. n

It's really very simple. But whether i want to program it? Not
real sure, probably, as i'm going to a quad xeon to
generate them and these processors are each dead slow.

>On September 08, 2002 at 07:33:54, GuyHaworth wrote:
>
>>
>>The practice of generating 6-man EGTs not only generates the EGTs but generates:
>>
>>- experience in generating EGTs
>>- awareness of the problem that distribution of the information is not easy
>>
>>New ideas are coming forward from time to time, and these will be even more
>>useful for larger EGTs.
>>
>>e.g.:  If we had a GIMPS- or SETI-like distributed-community approach to
>>generating EGTs, an HQ distributing the remaining unsolved problems, we would
>>not be taking years to generate 6-man EGTs.
>>
>>We are not using parallel computers ... or distributed communities yet.
>>
>>Nor are we generating DTC or DTZ EGTs (which involve smaller depths and
>>therefore less space), or getting a better compression in 'real-time versions of
>>the EGTs' by setting 'broken' values' to 'last seen' values.
>>
>>This last is admittedly a 'finesse' and assumes that no 'broken' positions are
>>enquired about - or at least that the access-code checks for 'broken positions'.
>>
>>g
>
>Distributed generation will not work. Even clusters can't be used
>to generate EGTB, as Bob Hyatt wrote some time ago.
>
>Olaf Jenkner



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