Author: Michel Langeveld
Date: 14:38:11 07/27/99
Go up one level in this thread
On July 26, 1999 at 14:49:33, José de Jesús García Ruvalcaba wrote: >On July 26, 1999 at 14:08:44, Michel Langeveld wrote: > >>On July 26, 1999 at 14:05:08, José de Jesús García Ruvalcaba wrote: >> >>>On July 26, 1999 at 11:24:58, Paul Richards wrote: >>> >>>>IBM announced a new Enterprise Storage Server that scales up to 11 terabytes. >>>>Just wondering what some idly rich chess fanatic could do with that. :) >>> >>> I could be wrong, but it seems to me that full uncompressed six-men tablebases >>>would barely fit in 11 terabytes. >>>José. >> >>If I'm not wrong the the size of all 5 men tablebases should represent one 6 men >>tablebase. The size of all commonly used tablebases is about 5Gb compressed. > > It is 5.9Gb, and it is not even full five-men tablebases. > >>So >>I think the size of a one 6 men compressed endgame should fit under 10Gb... >> >>Michel Langeveld > > 1870 files (according to my computations which can be wrong) are required for >full six-men tablebases. If we take them uncompressed, I think we are close to >11Tb. >José. I think you counted wrong. Did you included the fact: -KBNK and KNBK is the same table. -KPKB is the same table as KBKP. So the real number of tables is far below 1870 and the real size is also FAR below 11T. I think even the 20Gb called in a another post is too large for _ALL_ _COMPRESSED_ 5 men tables. I remember a post of Eugene Namilov to the Crafty mailing list were he assumed 25Gb should be enough to hold a 6 men table. He had figures for tables with pawns and tables without pawns. He had also some nodes to compress the current compressed files of a 5 men endgame even further but didn't want to spent energy to e few extra %. Another interesting facts: -each year the storage size of a harddisk doubles; -the number of Mhz of a PC doubles each 18 months. Regards, Michel Langeveld
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