[Gllug] power usage utility?

[Simon Wilcox]

On 18/1/10 12:41, James Hawtin wrote:
> On Mon, Jan 18, 2010 at 12:32:33PM +0000, Oliver Howe wrote:
>>    Is there a way of  finding out how much electricity a server is using
>>    without having to power it down and plug in a ampmeter?
>>    I need to know how much power each server is using in order to make
>>    some cost savings at our data centre,
>>    but obviously it would cause some problems if I have to power them down
>>    and up again.
>>    The servers run on centos 5.x , fedora 4, solaris 5.7, freebsd 6.2.
>>    Thanks,
>>    Oliver
> 
> You could get a clamp based power meter that clips over the cable. I believe
> they work buy using the Hall Effect. Here is an example
> 
> http://www.fluke.co.uk/comx/show_product.aspx?locale=uken&pid=36919

Note that these meters do not work when clamped around your average twin 
& earth mains cable. You must be able to separate the cores and clamp 
just the live or neutral side.

Carving an inch of insulation off a running server's power lead with a 
stanley knife probably contravenes far too many H&S regulations to be 
worthy of contemplation...

If anyone knows of one that works over normal mains leads I would love 
to hear about it as I'd like to get one for exactly this type of 
application.

S.
-- 
Gllug mailing list  -  Gllug at gllug.org.uk
http://lists.gllug.org.uk/mailman/listinfo/gllug