funsec mailing list archives
Re: Database design.
From: Drsolly <drsollyp () drsolly com>
Date: Tue, 6 Jun 2006 23:51:31 +0100 (BST)
On Tue, 6 Jun 2006, Blue Boar wrote:
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,
The power supply rating, is the maximum it can supply, not what it actually burns. I also get 300 watt power supplies for my boxes.
and probably use an average of 200W while working? (Since the power supply rating is a theoretical peak.)
Like I said - I put a clamp wattmeter on a server, and I'm telling you what I measured. 150 watts on start-up (that's because you're spinning up the drives), 110 watts when the computer is working hard, 75 watts when it's doing nothing.
Or another way to estimate: http://www.nppd.com/My_Home/Product_Brochures/Additional_Files/electric_usage.asp It says "Computer w/Monitor, Printer 77.6ยข / 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.
I'm not sure what your figure would mean in kilowatts. Also, remember that servers wouldn't have monitors or printers. And switches (you'd want one per 32 or 48 computers) would take very little electricity compared to the 400 servers. _______________________________________________ Fun and Misc security discussion for OT posts. https://linuxbox.org/cgi-bin/mailman/listinfo/funsec Note: funsec is a public and open mailing list.
Current thread:
- Re: Database design., (continued)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Blue Boar (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Valdis . Kletnieks (Jun 06)
- Re: Database design. Brian Loe (Jun 07)
- Re: Database design. Blue Boar (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Valdis . Kletnieks (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Blue Boar (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Valdis . Kletnieks (Jun 06)
- Re: Database design. Andrew (Jun 06)
- Re: Database design. Drsolly (Jun 06)
- Re: Database design. Valdis . Kletnieks (Jun 06)
- RE: Database design. Blanchard_Michael (Jun 07)
- RE: Database design. Drsolly (Jun 07)
- Re: Database design. Brian Loe (Jun 07)
- Re: Database design. Drsolly (Jun 07)
- Re: Database design. Brian Loe (Jun 07)
- Re: Database design. Drsolly (Jun 07)