RE: Blade Servers
- From: "Matthew Zito" <mzito@xxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 9 Apr 2004 15:13:05 -0400
So, the "domain" functionality can be very nice, but there are some =
serious limitations with it. Notably, migrating CPUs around requires =
"freezing" and "thawing" the domains to add processors and RAM - each =
requiring roughly 30 seconds of downtime. On top of that, you are very =
limited as to how you can assign processors to domains without creating =
potential failure scenarios (where the failure of a CPU in one domain =
takes out another domain as well). Also, the smallest partition you can =
have is a single cpu/memory board - which is 4-processors, and you're =
limited to 18 domains total across the whole system.
In terms of space, power, cooling, the e15k is a bear. The 15k needs 12 =
30A 208V circuits, 6 of them minimum for operation, takes up almost two =
rack widths across, and two racks deep. All this for a maximum of 106 =
processors. In comparison, you can put 168 Intel processors in one =
standard 42U rack (using IBM blades), and the power utilization will =
require 4 30A 208V circuits (with a lot of headroom!), 2 minimum for =
operation. Each of these circuits, in a datacenter, is going to run you =
roughly $3k/mo
Plus the cost difference, list - for a 72 processors e15k (that still =
has all the heating,cooling, space requirements I described above), the =
list price is $2.6m
From IBM, the same config lists out at $650k in blades, including =
chassis, etc., and the space, power, etc. is a little over half the =
amount described above. =20
I realize that money may not be an issue, but if you're building out =
lots of small servers, the logic of using a huge Sun server and =
partitioning it escapes me, I'm afraid.
Thanks,
Matt
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Stephen.Lee@xxxxxxxx
Sent: Friday, April 09, 2004 2:47 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: RE: Blade Servers
If you move into the more sophisticated servers, you get features like
multiple, independently bootable "domains", where you can move CPU's =
between
domains; and you see additional hardware robustness not present in =
little
boxes.
If money is no object, then recall IBM's TV commercial where the execs =
walk
into the data center, and the room is empty except for the one IBM =
server in
the corner? If money is no object, consider what you can run on a =
single,
fully pumped up E15K. I can't see how going to blades is going to save
space.
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