Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

RE: Energy consumption vs % utilization?

  • From: Hannigan, Martin
  • Date: Tue Oct 26 14:52:14 2004



This is far more complicated than this. That's why I suggested 
the Datacenters list.

A lot is determined not just by your revenue target per square foot, 
but cooling, your distribution, your breaker density and sizing, etc.

-M<



--
Martin Hannigan                         (c) 617-388-2663
VeriSign, Inc.                          (w) 703-948-7018
Network Engineer IV                       Operations & Infrastructure
hannigan@verisign.com



> -----Original Message-----
> From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of
> Nils Ketelsen
> Sent: Tuesday, October 26, 2004 2:09 PM
> To: nanog@merit.edu
> Subject: Re: Energy consumption vs % utilization?
> 
> 
> 
> On Tue, Oct 26, 2004 at 01:52:51PM -0400, Gregory (Grisha) 
> Trubetskoy wrote:
> 
> > Sorry, this is somewhat OT.
> 
> Also Sorry, but I think the question itself is completely flawed.
> 
> > 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?
> 
> What does 98% underutilized mean?
> 
> What is the utilization of a device with fully built out RAM 
> that is used
> to 100%, when the CPU is used 2% only?
> 
> What is the utilization of a system, that uses two percent of the
> memory and two percent of the available CPU time, when the policy
> of the top secret organization owning this system requires, that the
> application is running on a seperated machine?
> 
> Sure many machines might be (computing power wise) able to
> handle Firewalling, Routing, Webserving, Database Serving, 
> Mailserving and
> storing accounting data, but still there might be very good reasons to
> seperate these on different machines.
> 
> If you take points like policy requirement (see above:
> an application might by policy utilize a machine to 100%), 
> different types
> of resources, failover etc. into account, you might end up
> with different numbers then just looking at the CPU (and I
> have the feeling that is what you did or were intending to do).
> 
> Actually I think nobody does calculate "real" utilization,
> as there are a lot of soft factors to be taken into account. 
> 
> Nils
> 




Discussion Communities


About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home


Merit Network, Inc.