[103444] in North American Network Operators' Group
Re: rack power question
daemon@ATHENA.MIT.EDU (vijay gill)
Mon Mar 31 01:28:52 2008
Date: Sun, 30 Mar 2008 22:27:22 -0700
From: "vijay gill" <vgill@vijaygill.com>
To: michael.dillon@bt.com
Cc: nanog@merit.edu
In-Reply-To: <D03E4899F2FB3D4C8464E8C76B3B68B00230E35B@E03MVC4-UKBR.domain1.systemhost.net>
Errors-To: owner-nanog@merit.edu
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On Sun, Mar 23, 2008 at 2:15 PM, <michael.dillon@bt.com> wrote:
>
> Given that power and HVAC are such key issues in building
> big datacenters, and that fiber to the office is now a reality
> virtually everywhere, one wonders why someone doesn't start
> building out distributed data centers. Essentially, you put
> mini data centers in every office building, possibly by
> outsourcing the enterprise data centers. Then, you have a
> more tractable power and HVAC problem. You still need to
> scale things but it since each data center is roughly comparable
> in size it is a lot easier than trying to build out one
> big data center.
>
Latency matters. Also, multiple small data centers will be more expensive
than a few big ones, especially if you are planning on average load vs peak
load heat rejection models.
>
> If you move all the entreprise services onto virtual servers
> then you can free up space for colo/hosting services.
There is no such thing in my experience. You free up a few thousand cores,
they get consumed by the next lower priority project that was sitting around
waiting on cpu.
>
>
> You can even still sell to bulk customers because few will
> complain that they have to deliver equipment to three
> dara centers, one two blocks west, and another three blocks
> north. X racks spread over 3 locations will work for everyone
> except people who need the physical proximity for clustering
> type applications.
>
Racks spread over n locations that aren't within a campus will be more
expensive to connect.
/vijay
>
> --Michael Dillon
>
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<br><br><div class="gmail_quote">On Sun, Mar 23, 2008 at 2:15 PM, <<a href="mailto:michael.dillon@bt.com">michael.dillon@bt.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
Given that power and HVAC are such key issues in building<br>
big datacenters, and that fiber to the office is now a reality<br>
virtually everywhere, one wonders why someone doesn't start<br>
building out distributed data centers. Essentially, you put<br>
mini data centers in every office building, possibly by<br>
outsourcing the enterprise data centers. Then, you have a<br>
more tractable power and HVAC problem. You still need to<br>
scale things but it since each data center is roughly comparable<br>
in size it is a lot easier than trying to build out one<br>
big data center. <br></blockquote><div><br>Latency matters. Also, multiple small data centers will be more expensive than a few big ones, especially if you are planning on average load vs peak load heat rejection models.<br>
<br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
If you move all the entreprise services onto virtual servers<br>
then you can free up space for colo/hosting services.</blockquote><div><br>There is no such thing in my experience. You free up a few thousand cores, they get consumed by the next lower priority project that was sitting around waiting on cpu.<br>
</div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
<br>
You can even still sell to bulk customers because few will<br>
complain that they have to deliver equipment to three<br>
dara centers, one two blocks west, and another three blocks<br>
north. X racks spread over 3 locations will work for everyone<br>
except people who need the physical proximity for clustering<br>
type applications.<br>
</blockquote><div><br>Racks spread over n locations that aren't within a campus will be more expensive to connect.<br><br>/vijay<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
--Michael Dillon<br>
</blockquote></div><br>
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