Don't know one offhand. Depending on your application, you could do
something like that with an individual UPS for each device, then poll
the UPS via their serial ports for that data. What's the application?
Distros that monitor aggregate amperage are out there, usually as an
Get a number of Watts Up or Kill-A-Watt meters and plug a server into
each one. Run for a while and read the average power consumption.
I doubt you can save any money by replacing a server early, but there
may be other considerations. Obviously, buy the most energy-efficient
machines you can when you do replace them at the end of their normal
or scheduled lifetimes.
Fortunately, AMD and Intel are now talking about low-power,
high-performance machines, though there's a lot of marketing
double-speak you have to wade through, and lots of traps for the
unwary (processor thermal design power versus box elecrical
consumption, for instance).
The thing you also have to be wary of is power factor issues. To
measuere that you need something like the FLuke model 46 (I think) power
quality meter. Put that on the power line and you can see all those
exciting harmonics and stuff. Power factor correction equipment may
reduce your electric bill noticeably.
Although your major power consumer isn't actually in the room. It's
the air conditioner that is removing all the heat that the electrical
power is being turned into. If you can lay your hands on on an
infrared camera, using that to look for hot spots will be useful.
For simple power consumption measurements, I'd just use an amp-clamp
meter and a notebook to write down the power readings. Computers use
surprisingly little power.
Maybe 50 servers all taking 125V AC.
But I would use a portable PDU of this type in many similar applications,
taking it to individual rooms where I have some device that I suspect might
be taking up a lot of CPU.
> >"Will" <DELETE email@example.com> wrote in message
Willy, I see your much more polite on the EE news group--and what ever
happened to your normal "rec.outdoors.rv-travel" signature....
The Curmudgen of Sill Hill
.....and sign off..."Poster Requests His Insults Removed in 6 Days"
I've never read, let alone posted, to rec.outdoors.rv-travel. Last time I
checked there were at least 15 million people in the U.S. alone with the
first name Will. No doubt some are rude. Don't hold it against everyone
with the same first name, please. :)
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