Chessify and hash tables

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schack
Posts: 171
Joined: Thu May 27, 2010 3:32 am

Chessify and hash tables

Post by schack »

I finally got Chessify to answer a question about hash table sizes for their different packages. Here's what they had to say:

"For 300MN/s, 700MN/s, and 1000MN/s dedicated servers of Stockfish, the hash table is 16 GB.
The same goes for Koivisto, Berserk, asmFish, and SugaR running on the 130MN/s dedicated server.
The hash table of up to 100MN/s shared server for the same engines is 8 GB."

This seems woefully underpowered for me. What is the practical strength hit with such small hash tables for such fast mini-clusters?
Werewolf
Posts: 1744
Joined: Thu Sep 18, 2008 10:24 pm

Re: Chessify and hash tables

Post by Werewolf »

That does seem small. Maybe there's a performance loss when sharing memory across servers.

On the endgames I've tested the 300 MN/s / 1000 MN/s and 2000 MN/s on, it solves frighteningly fast.
The 700 MN/s option seems poorly priced, so I stay away from that one.