[AusNOG] Data Suburb

[Bevan Slattery]

Over simplification of a very, very complex subject.  It's rather disingenuous to pretend that a 300KW "server room" is comparable to a 100MW IT load facility (admittedly in 6 rooms).  I've seen their cooling systems first hand and its outstanding with excellent levels of redundancies that you don't find in other facilities.  There is always a PUE hit on large scale colocation facilities which are designed economically and to scale economically.  Completely agree good design now substantially limits this (containment, free air cooling, some UPS technologies), but to pretend it is able to be all but completely avoided is not constructive in my opinion, particularly when you talk about scale.

1.24 PUE in the middle of the Nevada desert is an outstanding result particularly considering the high daytime temperatures, dust storms/particulate which require the more traditional cooling techniques during these times.  I would suggest this is at full capacity and not part load.

[b]

Their UPS's are actually providing protected power, not some efficient bypass technique which "kicks in" when there is a problem to.


From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Tony de Francesco
Sent: Wednesday, 4 January 2012 10:52 PM
To: 'Mark Newton'
Cc: ausnog at ausnog.net
Subject: Re: [AusNOG] Data Suburb

Poor PUE at part load is an excuse for poor design.

There is no theoretical reason why PUE should be much, if any, worse at part load compared to full load. It largely comes down to the choice of technologies and how they are controlled.

A good case in point is a 300kW (peak capacity) data centre we are monitoring in Melbourne.  It is less than 15% full and is still operating at a PUE of around 1.15 in winter and around 1.30 in summer. As the load increases we are expecting the PUE to stay about the same or maybe increase slightly.


Kind Regards

Tony de Francesco
Technical Director
email: tonyd at pue.com.au<mailto:tonyd at pue.com.au>
mob: +61 (0) 457 701 179
.....................................................
[cid:image001.jpg at 01CCCB88.96FA0420]
________________________________
From: ausnog-bounces at lists.ausnog.net<mailto:ausnog-bounces at lists.ausnog.net> [mailto:ausnog-bounces at lists.ausnog.net]<mailto:[mailto:ausnog-bounces at lists.ausnog.net]> On Behalf Of Mark Newton
Sent: Wednesday, 4 January 2012 11:07 PM
To: Phillip Grasso
Cc: ausnog at ausnog.net<mailto:ausnog at ausnog.net>
Subject: Re: [AusNOG] Data Suburb


On 04/01/2012, at 9:20 PM, Phillip Grasso <phillip.grasso at gmail.com<mailto:phillip.grasso at gmail.com>> wrote:
"The world's highest density large scale data centers are also the most efficient!"
Quoted from their site; also said they are 1.24 PUE, which compared to ancient datacenters might be pretty efficient but I won't say they are the "most efficient".


They aren't full yet. Efficiency always takes a hit when capacity is underutilized during the buildout phase, but improves rapidly when installed infrastructure starts to reach its designed "sweet spot."

Give 'em another year then look again.

   - mark

The information contained in this email and any attachments may be confidential. This email and any attachments are also subject to copyright. No part of them may be reproduced, adapted or transmitted without the written permission of the copyright owner. If you are not the intended recipient, any use, interference with, disclosure or copying of this information is unauthorised and prohibited. If you have received this email in error, please immediately advise the sender by return email and delete the message from your system. All email communications to and from NEXTDC Limited are recorded for the purposes of archival and storage.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ausnog.net/pipermail/ausnog/attachments/20120104/e670c234/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 24527 bytes
Desc: image001.jpg
URL: <http://lists.ausnog.net/pipermail/ausnog/attachments/20120104/e670c234/attachment.jpg>