Author: Eugene Nalimov
Date: 21:32:07 07/29/99
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I explained *many* times: generator is a hobby. I had not much time to work on it (my wife and daughter went to Russia, so I had a month when I could use 2-3 hours each evening for it), and I concentrated mainly on compactness of the resulting TBs. So, during developing I made several decisions that greatly simplified generator, but slowed it down and/or made it to use more memory. Examples of such decisions are: use of forward algorithm instead of backward one, probing of minor TBs at each iteration, keeping of the entire TB pair in memory, not using more than one CPU, etc. Resulting generator works slow and consumes a lot of memory, but it works, and we have *all* necessary TBs for a long time now. I am doing a database development in a *large* company, so I could use several powerful machines during nights and weekends. Now answering your question: I suspect that it's faster to download 5-man TBs with pawns than to generate them on your hardware. Typical 5-man TB with generated in from 1 to 3 days of Alpha/533 (roughly equivalent to PII/400) with 512Mb of RAM and *very* fast disk. The longest one was KQPKQ - ~120 hours. KRPKR used ~80 hours. Typical 5-man pawnless TB will be generated in 6-24 hours at PII/400 with 160Mb of RAM. Also please note that generator stresses hardware much more than typical program. I have a lot of trouble reports concerning generator, but in all cases problems were in hardware (usually bad memory). Eugene On July 29, 1999 at 16:12:19, KarinsDad wrote: >On July 29, 1999 at 14:47:34, Dann Corbit wrote: > >>On July 29, 1999 at 14:37:47, Laurence Chen wrote: >>[snip] >>>Question: are these tablebases ready to be used or do I need to run the table >>>generator in order to make it accessible? >>Ready to go. >>But you can also generate them if you like. For people with a modem connection >>and a fast machine with lots of ram, that is what I would recommend. If you >>have isdn or satellite link, just download them. > >How long (ballpark guess +- 6 hours maybe) would it take to generate the 3, 4, 5 >piece tablebases on a PIII 450 (assuming enough memory, does it really take >512M?)? > >KarinsDad :)
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