nanog mailing list archives
Re: Energy consumption vs % utilization?
From: Alex Rubenstein <alex () nac net>
Date: Tue, 26 Oct 2004 14:31:20 -0400 (Eastern Daylight Time)
Hello,I've done quite a bit of studyin power usage and such in datacenters over the last year or so.
I'm looking for information on energy consumption vs percent utilization. In other words if your datacenter consumes 720 MWh per month, yet on average your servers are 98% underutilized, you are wasting a lot of energy (a hot topic these days). Does anyone here have any real data on this?
I've never done a study on power used vs. CPU utilization, but my guess is that the heat generated from a PC remains fairly constant -- in the grand scheme of things -- no matter what your utilization is.
I say this, because, with a CPU being idle of 100% utilized, they still are grossly inefficient, on the order of less than 10% in all cases (ie, 1 watt in returns at least .9 watts of heat, no matter loading of the CPU).
-- Alex Rubenstein, AR97, K2AHR, alex () nac net, latency, Al Reuben -- -- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --
Current thread:
- Re: Energy consumption vs % utilization?, (continued)
- Re: Energy consumption vs % utilization? Nils Ketelsen (Oct 26)
- Re: Energy consumption vs % utilization? Deepak Jain (Oct 26)
- Re: Energy consumption vs % utilization? Erik Haagsman (Oct 26)
- Re: Energy consumption vs % utilization? Jack Bates (Oct 26)
- Re: Energy consumption vs % utilization? Valdis . Kletnieks (Oct 26)
- Re: Energy consumption vs % utilization? james edwards (Oct 26)
- Re: Energy consumption vs % utilization? Alex Rubenstein (Oct 26)
- Re: Energy consumption vs % utilization? Erik Haagsman (Oct 26)
- Re: Energy consumption vs % utilization? Alex Rubenstein (Oct 26)
- Re: Energy consumption vs % utilization? james edwards (Oct 26)
- Re: Energy consumption vs % utilization? Alex Rubenstein (Oct 26)
- Re: Energy consumption vs % utilization? Nils Ketelsen (Oct 26)
- Re: Energy consumption vs % utilization? Alex Rubenstein (Oct 26)
- Re: Energy consumption vs % utilization? Steven M. Bellovin (Oct 26)
- Re: Energy consumption vs % utilization? Alex Rubenstein (Oct 26)
- Re: Energy consumption vs % utilization? Andre Oppermann (Oct 27)
- Re: Energy consumption vs % utilization? Nik Hug (Oct 27)
- Re: Energy consumption vs % utilization? Andre Oppermann (Oct 27)
- Re: Energy consumption vs % utilization? Steven M. Bellovin (Oct 26)
- Re: Energy consumption vs % utilization? David Lesher (Oct 26)
- Re: Energy consumption vs % utilization? Krzysztof Adamski (Oct 26)
- Re: Energy consumption vs % utilization? David Lesher (Oct 26)