Author: José de Jesús García Ruvalcaba
Date: 16:02:19 07/27/99
Go up one level in this thread
On July 27, 1999 at 17:38:11, Michel Langeveld wrote: >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. Yes. >-KPKB is the same table as KBKP. Yes too; but KBKP needs two files, one with white to move and one with black to move, and I took in account this fact too. > >So the real number of tables is far below 1870 I do not think so. I did not recheck my computations, and there can be a mistake, but I do not think the real number is "far below". But anyway this is an easy combinatorics problem, you should be able to solve it yourself and post your result. >and the real size is also FAR >below 11T. I do not know. >I think even the 20Gb called in a another post is too large for _ALL_ >_COMPRESSED_ 5 men tables. > Of course, the compressed 3+2 plus full four men tablebases is 5.9Gb. I think the full five men COMPRESSED tablebases should fit in less than 10Gb. The 20Gb figure was taken from ICC crafty's finger notes. Crafty there does not use compressed tablebases, but uncompressed ones. And it does not have complete five men tablebases (the 4+1 are missing, and I do not think they are very useful anyway). >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 José.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.