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Subject: Re: Tablebases on 2 Hard Disks??

Author: Chuck

Date: 05:44:04 11/07/05

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On November 07, 2005 at 08:02:55, Ray Banks wrote:

>On November 07, 2005 at 06:30:35, Per Jørgensen wrote:
>
>>Hi Chesscomputerfans!
>>
>>I seriously consider to buy an AMD Dual Core CPU in order to be able to arrange
>>Enginematches with Pondern ON. I got a good advice here in the Forum; buy a
>>second Hard Disk and copy the TB's on this one so that you have 2 paths to the
>>TB's located on two different Hard Disks. I do my testing in the Shredder 9
>>surface and I can see that I can add up to 4 paths to the location of the TB's.
>>No problem. Here comes my question: How do I exactly tell an engine (it could be
>>Fruit 2.2.1, Shredder 9, Fritz 9 or anyone else who supports TB's) that it
>>should use path 1 and told the opponentengine to use path 2??
>>
>>I hope someone can help me :-)
>>
>>Best regards
>>Per
>
>I don't think you can do that, unless an engine has it's own ini file and even
>then I'm not sure which would override which.
>
>Anyway I don't believe you need to with a single ponder on match. There is only
>one position, and there will be some commonality with what tablebases are being
>accessed, and they will be cached firstly by the value in MB you set in the GUI,
>and secondly by the O/S. That is my view, but others may well disagree

I think you will have some contention between the two engines unless you put the
tablebases on two hard drives on separate disk controllers. This would minimize
the contention as much as I can imagine, but won't eliminate it completely. The
engine not on move would thus interfere with the engine to move. Better to use
two separate computers IMO, but personally, I don't see what's wrong with
running ponder off matches. You want to know the strength of the engines and it
seems to me that ponder off will give you a pretty reliable result.

Cheers,

Chuck



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