Energy consumption vs % utilization?

Nik Hug lists.nik at
Wed Oct 27 09:55:03 UTC 2004

From: "Andre Oppermann"
>  From running a Colo in a place with ridiculus high electricity engery
> costs (Zurich/Switzerland) I can tell you that the energy consuption
> of routers/telco (70%) and servers (30%) changes changes significantly
> throughout the day.  It pretty much follows the traffic graph.  There
> is a solid base load just because the stuff is powered up and from there
> it goes up as much as 20-30% depending on the routing/computing load of
> the boxes.  To simplify things you can say that per packet you have that
> many "mWh" (milli-Watt-hours) per packet switched/routed or http requests
> answered over the base load.  I haven't tried to calulate how much energy
> routing a packet on a Cisco 12k or Juniper M40 cost though.  Would be
> very interesting if someone (student) could do that calculation.

the same variation between night and day here - but from our point of view
the consumption of the air-pack's are making the differences during the day
...  traffic-graph and outside temperature-graphs show more or less the same
up and down. Would we interesting to have separate values for the power
consumption between server-equipment and air-co ...



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