Re: New 6-piece tablebases
Posted: Sun Apr 07, 2013 1:04 am
You have an interesting way of dealing with user feedback.Daniel Shawul wrote:I decide to keep them in based on what i have. Stop spreading FUD or own up to your claims.
You have an interesting way of dealing with user feedback.Daniel Shawul wrote:I decide to keep them in based on what i have. Stop spreading FUD or own up to your claims.
Good! On Linux or on Windows? How much RAM does your system have?jshriver wrote:I'm working on the gen now!
With minor modifications it could generate 7-men tables, but the machine to run it would need about 1628 GB of RAM fully addressable by all processors for pawnless tables . Less for tables with pawns, since those are generated file by file. With a small change the requirement for pawnless could be lowered to about 1280 GB.P.S. Any thoughts on expanding to 7-men?
16gigs DDR3 Ubuntu Linux.syzygy wrote: Good! On Linux or on Windows? How much RAM does your system have?
Sergey Yankovich wrote such a generator. From what I have read it is able to generate 7-men tables on commodity hardware using months of heavy disk access per table. (There are some posts on this by "De Knaller" on the Rybka forum.)jshriver wrote:I can't speak for anyone else, but personally I would rather have a 7men that is horrible slow, disk crunching, but works, than another 5-10 years of none
It is possible to generate single tables, but a complete 7-men set is still too big to be stored, distributed or accessed during search with any efficiency. With massive resources it is of course possible, as was shown by the people behind the Lomonosov tables.When I started my interest 5-6+ years ago, it seemed 7men was possible but nothing really came about because people were wanting something super efficient. Sadly even if it wasn't efficient, if we *had* something back then it might be completed now.
For the pawnless 6-men tables that seems a good idea. 16 GB might about suffice for the tables with pawns, but of course you can't generate those without the pawnless tables. I think tables without pawns need about 26-27 GB. I might look into adding an option that lowers this to 20-21 GB so that 24 GB is enough.jshriver wrote:16gigs DDR3 Ubuntu Linux.syzygy wrote: Good! On Linux or on Windows? How much RAM does your system have?
Though this might be the push I need to get another couple 8gig sticks so I can generate the 6men set.
I certainly don't mind!If you don't mind, I'd like to host the 3-4-5 dataset on my site like I do the Gaviota set.
If generation of all 6-men tables in RAM took "less than 5 days" with Ronald's generator (so probably more than 4 days) then generation of all 7-men tables in RAM (if the required hardware were available) would take several years, you know why.jshriver wrote:I can't speak for anyone else, but personally I would rather have a 7men that is horrible slow, disk crunching, but works, than another 5-10 years of none
Aye, understand the logic behind it. Just been itching for 7-men data for nearly a decade now. Meant no disrespect toward Mr Ronald de Man. Was just curious .Sven Schüle wrote:
Now what should we expect from the much slower, disk-based approach? Maybe you would see the first 7-men table done after those 5-10 years ...
Sven