Re: [SLE] SUSE = Ubuntu? (now power consumption)
On Monday 25 September 2006 21:22, M Harris wrote:
Tomorrow when I have a little more time I will measure the entire system again, this time with each machine cranking on a 20,000 digit computation of pi--- just to see what the overall load increase will be with all of the processors "hot" so to speak--- never measured that before either! Ok, again as promised, I measured my home system/network for a contrast comparison between all processors idle vs all processors pegged. First I established a baseline for the house (systems down) including my office cd amp (forgot that before). So... I removed the cd amp from the system load numbers. The entire network up and idling consumes 625 watts (see previous post for network compliment). I then shipped this command to each processor on the network to get it cranking on a computation of pi to 50,000 digits:
time echo "scale=50000; 16*a(1/5)-4*a(1/239)" |bc -lq The scale was chosen significantly large enough so that even the fastest machine on the network could in no way complete the calculation before I could take the measurement. ( to see the pi calculation complete on your own system in a reasonable time set the scale to something smaller than 1000 ). Survey says.... With all processors pegged the entire network consumes *780 watts*. So, to put this in perspective, even with all processors pegged the entire network still consumes 5% less power than my coffee maker. Over an (8) hour day the network will consume 6.2 KwHr pegged vs 5.2 KwHr idling. The coffee maker consumes about 6.6 KwHr over that same period. Moral to the story?? Well, if I give up coffee.... I will be healthier and the savings will completely pay for running my home network. ;-))) -- Kind regards, M Harris <><
M., On Tuesday 26 September 2006 16:56, M Harris wrote:
...
Moral to the story?? Well, if I give up coffee.... I will be healthier and the savings will completely pay for running my home network. ;-)))
Coffee is, in fact, a very health drink. Caffeine itself is a powerful antioxidant that is both fat- and water-soluble. Moderate coffee consumption is associated with reduced LDL ("bad" cholesterol) levels and reduced incidence of type II (a.k.a. adult-onset) diabetes. Only in grossly excessive quantities does it have any negative effects, and those are transitory. Well, there's tooth discoloration with prolonged heavy use.
M Harris <><
Randall Schulz
On Tuesday 26 September 2006 22:35, Randall R Schulz wrote:
Moral to the story?? Well, if I give up coffee.... I will be healthier and the savings will completely pay for running my home network. ;-)))
Coffee is, in fact, a very health drink. Caffeine itself is a powerful antioxidant that is both fat- and water-soluble. Moderate coffee consumption is associated with reduced LDL ("bad" cholesterol) levels and reduced incidence of type II (a.k.a. adult-onset) diabetes.
Ok... thanks... I needed that encouragement.... was only a transitory thought that I was entertaining anyway... I'm back to my original plan... make my coffee, pour it into a thermos, unplug the coffee maker... and then fire up the network... :-)) -- Kind regards, M Harris <><
On Tuesday 26 September 2006 15:56, M Harris wrote:
With all processors pegged the entire network consumes *780 watts*. So, to put this in perspective, even with all processors pegged the entire network still consumes 5% less power than my coffee maker. Over an (8) hour day the network will consume 6.2 KwHr pegged vs 5.2 KwHr idling. The coffee maker consumes about 6.6 KwHr over that same period.
Remind me again how many machines on this network? And did your measurements include monitors or only processors? -- _____________________________________ John Andersen
On Wednesday 27 September 2006 02:40, John Andersen wrote:
Over an (8) hour day the
network will consume 6.2 KwHr pegged vs 5.2 KwHr idling. The coffee maker consumes about 6.6 KwHr over that same period.
Remind me again how many machines on this network? And did your measurements include monitors or only processors? ..... as measured on the public utility meter---- for *twelve* systems, router, access points(2), printers (3), flat panels(4) and ThinkPad (plugged in). So, to put this in perspective, my 12 cup Krups coffee maker consumes 820 watts... Yes, all of this was at one time on one circuit. Its spread all over the house now. Most of our systems are run headless. However, during my measurements the (4) flat panels were powered up and lit.
The main points here were basically these: 1) A nice home cluster can be cheaply constructed from old pc hardware running Suse linux. Don't throw those old boxes out just because Windoze X-tra Pricy won't run on them... ;-) 2) Home clusters can be operated cheaply... and now I know how cheaply... for less bucks than running your basic drip coffee maker.... -- Kind regards, M Harris <><
participants (3)
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John Andersen -
M Harris -
Randall R Schulz