Author: Chessfun
Date: 22:01:12 03/31/02
Go up one level in this thread
On March 31, 2002 at 18:41:24, Mike Hood wrote: >The normal figure thrown about for the size of a complete 6-piece egtb >collection is "about a terabyte". Can we try to make this figure a bit more >accurate? In the tablebase generation program the file size calculation is >separate from the generation itself, so it should be possible to calculate the >size of the uncompressed files exactly. When we have that we can make an >estimation of the size of the compressed tablebases (approx 20% of the >uncompressed size). And when we have that figure we can sit back and watch the >developments in storage media to see when 6-piece TBs become technically >feasible. Constellation 3D promised their FMD technology would produce optical >disks with a capacity of 1.5 terabyte, but they've failed to deliver so far. > >There should be 365 6-piece tablebase pairs of varying importance, in three main >groups: > >Kxx-Kxx : 120 tablebases >Kxxx-Kx : 175 tablebases >Kxxxx-K : 70 tablebases > >If we have the size for each group we'll know how much space a person needs on >his hard drive to generate KPPKPP, KPPPKP and KPPPPK respectively. Or someone >can fire up his university's supercomputer. > >Maybe it's just an academic pursuit at present, but technology has a habit of >overtaking you when you least expect it. > >And when we've finished with the 6-piece tablebases, what about the 7-piece >egtb's? > >Kxxx-Kxx : 525 tablebases >Kxxxx-Kx : 350 tablebases >Kxxxxx-K : 126 tablebases > >I bet you're all dying to get your hands on the KBBBBBK tablebase ;) According to John the next CM will have a 6 person tablebase generator http://www.talkchess.com/forums/1/message.html?220246 The generation size of all 6 person bases will be compressed and will only take 15 Gb, generation of all 6 person will take about 8 hours. Sarah.
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