[kwlug-disc] [OT] linux server power

L.D. Paniak ldpaniak at fourpisolutions.com
Sun Jan 30 10:55:47 EST 2011


Here is your new low-power server:

http://www.semiaccurate.com/2011/01/26/compulab-announces-tegra-2-powered-trim-slice/

Or you can just run a hacked router with TDP<10W.

On the other hand, as a very clever classmate of mine once asked:  What
is wrong with power consumption in the winter?  You need to heat your
house anyway.  You'll probably run your furnace more to make up for your
super energy-conscious new server. Think of a server as a funny looking
baseboard heater. 

The flip-side of this argument are cooling requirements in the summer
and the shoulder seasons where you might not need extra heat in the
house/office.  Then the computation of "energy savings" gets
complicated.


On Sat, 2011-01-29 at 17:35 -0800, Raul Suarez wrote:
> I plugged my watt-o-meter to my Pentium III 400 Mhz.
> 
> After 12 hours the cost at $0.062 was 4 cents. Extrapolating: $30 / year
> 
> The average power consumption was 70 Watts 
> 
> Using a 7 watts computer the cost would be $3.00
> 
> If it costs $100, it pays back in less than 4 years.
> 
> I found these plug computers (based on the sheevaplug design). These are full 
> blown micro servers I'm seriously considering.
> http://www.ionicsplug.com/compare.html
> http://www.globalscaletechnologies.com/p-31-guruplug-server-standard.aspx
> Raul Suarez
> 
> 
> Technology consultant
> Software, Hardware and Practices
> _________________
> Twitter: rarsamx
> http://rarsa.blogspot.com/ 
> An eclectic collection of random thoughts
> 
> 
> 
> ----- Original Message ----
> From: Insurance Squared Inc. <gcooke at insurancesquared.com>
> To: KWLUG discussion <kwlug-disc at kwlug.org>
> Sent: Sat, January 29, 2011 8:37:54 AM
> Subject: Re: [kwlug-disc] [OT] linux server power
> 
> There are other factors.
> 1) if I use something quiet and fanless, I can relocate out of the furnace 
> room.  That's a plus.
> 2) Deduct the resale value of a 3.06 ghz tower server and a dual xeon w 8gigs HP 
> workstation (maybe $100total?) and payback period could be a year or two.
> 3) The machines are older, they're not forever.  I'll have to buy new hardware 
> before 5 years is up.  So we're really looking at moving a purchase ahead 2-3 
> years rather than a brand new purchase.
> 
> 
> The 10c per KWH was what the electrician used.  And if his high estimate of 
> $30/month is reasonable, and we drop down to $7 a month electrical cost with 
> lower hardware, and I sell the old equipment, payback is in less than a year.  
> How can I afford NOT to buy new computers?  :).
> 
> 
> 
> 
> 
> 
> On 29/01/11 08:24 AM, John Johnson wrote:
> > On 2011-01-29 06:57, Raul Suarez wrote:
> >> Coincidentally I was reading about trixbox and found this
> >> http://www.888voipstore.com/trixbox-ce-micro-appliance.html 
> > In context, the power consumption of the "fanless" trixbox PBX (which can run 
> >under Linux) is:
> > <1W at standby
> > 6W at low CPU load
> > <7W at 1080p H.264 playback
> > 8W at full CPU load
> > 
> > Assuming a VoIP server at approx. 100W and 7W for the trixbox VoIP server we 
> >have a savings of 93W.
> > 
> > per John Van O
> > 
> > a 100W load running 24x7 would use 100W * 24H * 30.5 days / 1000 = 73.2 
> >kilowatt hours.
> > At 10c/KWh that's $7.32/month. (note: the 10c/kWH is an estimate and could be 
> >on the high side)
> > 
> > substituting 7W for 100W we have:
> > 
> > a 7W load running 24x7 would use 100W * 24H * 30.5 days / 1000 = 5.1 kilowatt 
> >hours.
> > At 10c/KWh that's $0.51/month.
> > 
> > The savings of 93W over 24x7 would be 93W * 24H * 30.5 days / 1000 = 68.1 
> >kilowatt hours.
> > At 10c/KWh that's $6.81/month.
> > 
> > Nothing to sneeze at.
> > Except when one looks at the payback.
> > Assuming a cost of $400 ($US == $CDN) the payback is 58 months or almost 5 
> >years.
> > 
> > One would likely need another reason to justify the expense, e.g. downtime, 
> >reliability, size, noise, etc.
> > Or just simply the geek factor.
> > 
> > JohnJ
> > 
> > 
> > 
> > 
> > 
> > -----
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> > 
> > 
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