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Subject: Re: Tablebase Sizes?

Author: Ed Panek

Date: 21:18:56 12/04/03

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On December 04, 2003 at 21:18:40, Anson T J wrote:

>I have a few questions about tablebases, I currently have all the 3,4 and 5
>piece ones. I'm thinking if I should get the 6 men ones too.
>
>1. Whats the total size of 2,3,4,5 and 6 men tablebases currently available for
>download?
>
>2. How much Tablebase cache is required to use 6 men tablebases? (Will I need
>more than 512 MB ram total?)
>
>3. Which chessbase engines support 6+ men tablebases?
>
>thx in advance.

Just for fun I thought I would mention this...

Last week our company was at RSNA (Radiology show) in Chicago where Fujitsu is
now furthering the medical field supplying large scale media storage devices
with terrabytes of nearly instantaneous file retrieval and archival mostly for
PACS.(Imagine Large Hospitals like the Mayo Clinic with 20-30 workstation
storing 20 MB DICOM Images all day)  Using MO disks and also some Bluelight
DVD-R technology Fijitsu and also Dell demoed their systems for us. With 5-20 GB
of space available per media and jukeboxes full of 100-200 disks, they have >
1.5 terrabyte of storage or more. Mechanically the retrival system can access
almost any drive in less than 2 seconds. (That is retrieve the media and begin
reading.) I couldnt get the exact tranfer rate of the devices but I would
suspect they would be similar to SCSI devices normally found in the server
industry (Asynchronous 5 MB/s, Synchronous 10 MB/s non-sustained)

Typical cost for a system like this is $100K / Terrabyte  .... out of range for
most people and not including a service contract in case the device breaks (
which it looks like it would)

Unfortunatly even this technology would be not suited for retrieving 100-200 MB
tablebase files in very quick real time conditions. It was engineered for 10-20
MB files in short bursts.

Maybe in 3-4 years we will have reasonable ability to actually contain all the 6
man TB's and even more:-)



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