Re: Database design.

[Blue Boar <BlueBoar () thievco com>]

Drsolly wrote:
> > Drsolly wrote:
> > > 300 gb drives cost about $100. You can put four of those in one computer, 
> > > total cost maybe $600. For 460 terabytes, you'd need some 400 of those, 
> 400 computers at 100 watts per computer, would need 40 kw. Space 
> requirement - you could put it in a double garage. Aircon requirements 
> wouldn't be too bad, you could probably go with 20 kw to augment the 
> natural cooling. 
>
> Hardware really is cheap.

Grabbing a random Google match:
http://www.amug.org/amug-web/html/amug/reviews/articles/seagate16/
"According to the Kill-a-Watt electricity usage monitor, the Seagate 
300GB 8MB and 16MB SATA models use 11 watts when idle. When busy the 
Seagate 300GB SATA hard drives can utilize approximately 13 watts each. 
The Maxtor MaxLine III 7V300F0 uses 9 watts when idle and approximately 
12 watts when busy copying data."

Let's use 10 watts as an easy number to calculate with.  So that's 40W 
burned per machine with an ideal power supply.  Where do you buy these 
$200 60W computers?  All the standard clone shop PCs I buy come with 
300-400W power supplies, and probably use an average of 200W while 
working?  (Since the power supply rating is a theoretical peak.)

Or another way to estimate:
http://www.nppd.com/My_Home/Product_Brochures/Additional_Files/electric_usage.asp

It says "Computer w/Monitor, Printer  	77.6¢ / week", which comes to 
$16,140.80/year for 400 machines, if that number is accurate.  I expect 
you have no monitors & printers, but you do have network switches.  So 
adjust as appropriate.

                                                BB
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