Author: Chessfun
Date: 13:38:20 11/06/05
Go up one level in this thread
On November 04, 2005 at 14:33:01, Chessfun wrote: >On November 04, 2005 at 11:55:43, James T. Walker wrote: > >>On November 04, 2005 at 07:13:03, Chessfun wrote: >> >>>On November 04, 2005 at 06:04:34, Greg Simpson wrote: >>> >>>>Tablebase access can easily saturate the disk IO, so having two engines using >>>>them at once could be a problem. You could buy a small second hard disk and >>>>store a copy of the tablebases there and avoid this problem by directing one >>>>engine to use the tablebases on the main disk and the other the tablebases on >>>>the secondary disk. >>>> >>>>Other than tablebases, there should be some slow down from memory bus contention >>>>when two engines are running, mostly from hash table access I guess (hard to >>>>cache). I don't think think this would be a big issue for the X2 processors, >>>>but like you I would be interested if anyone could provide some real data. >>>> >>>>If you don't want to run ponder on you could get a bigger benefit from the dual >>>>core system by running two matches at once. >>> >>>That is exactly what I am doing right now x2 4200+. Except with tablebases I >>>have identical 5 piece placed on the same drive. C:\Nalimov and C:\Nalimov 1 >>>told each program in options where to go and thus far no problem. Originally >>>probing the same folder C:\Nalimov was a problem. >>> >>>Haven't noticed any other problems. If the two interfaces are CB then you need >>>to install the path to bases different naturally when installing the software, >>>so you'll end up with two locations where the tournaments or matches are taking >>>place. >>> >>>Sarah. >> >>Hello Sarah, >>I would like to know what problem you had when probing the same folder for >>tablebases. How did the problem show up? I'm running matches with ponder on >>and a single tablebase folder. Since I don't know what to look for I have seen >>no problem. >>Jim > >Hi Jim, > >When I first set up and ran two matches which was when I first bought the PC I >wasn't getting any time losses. Just engine exceptions, I guessed I could have >two programs trying to look at tablebases at the same time. One in each >interface and added the second folder. Since then no exceptions running for over >7 days non stop two interfaces. > >Are you running two matches, two interfaces?. Which two interfaces? > >Sarah. Seems when I added the second tablebase path c:\Nalimov 2 both my programs switched to using that same folder. Therefore seems my engine exception error was being caused by the six piece bases I have. Seems some engines have no problem using them others fail. That folder was listed as a second tablebase path and when I switched the path to Nalimov 2 I removed that path as well. Sarah.
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