[AusNOG] Power audit

[Damien Gardner Jnr]

Yeah, that's how I do it..  30cm long IEC-IEC cable with a section of 
outer removed, clamp meter around the active, unplug one side supply, 
plug cable inline with it, and plug back into server.  Take reading, 
remove from line and plug original cable directly back in.  Repeat for 
second PSU.   Repeat for every server.

Last time I ran it was just after we'd moved into one particular suite, 
where we were being told the gear in our new rack was pulling 4kW.  Was 
news to me, as while running the whole lot up in the lab, it'd been on a 
single 3kVA UPS, at about 2/3 load.. Sure enough, after measuring 
everything manually, it measured out at 1.9KW.  Sent a please explain to 
the provider, never heard back, notice their portal is still showing 
close to 4KW for our rack, but haven't had a 'you are using way too 
much' email from them again..  Guess it's good money, overcharging all 
their clients by 100% for power usage, they'd rather just sweep it under 
the carpet..? ;)

--DG

On 5/06/2013 3:31 PM, Ross Wheeler wrote:
>
>
>> On that basis, I'm tossing overboard as much kit as I can jettison 
>> and looking for like-minded sub-let tenant prospects who need a few 
>> RU for switches and could use our interconnects to a number of 
>> carriers. They will get a PDU as recommended but I'm sticking with my 
>> monthly manual email request for usage reporting until I muster the 
>> courage for downtime.
>
> One thing I didn't see mentioned - how much of your kit has dual 
> supplies?
> Simple matter to unplug just one power source and connect to 
> power-monitoring device, then once that supply is back online, do the 
> other lead?
>
> Just a thought...
> _______________________________________________
> AusNOG mailing list
> AusNOG at lists.ausnog.net
> http://lists.ausnog.net/mailman/listinfo/ausnog


-- 
Damien Gardner Jnr
VK2TDG/VK2DGJ. Dip EE. GradIEAust
rendrag at rendrag.net -  http://www.rendrag.net/
--
We rode on the winds of the rising storm,
  We ran to the sounds of thunder.
We danced among the lightning bolts,
  and tore the world asunder