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* Re: Scaling noise
@ 2003-09-03  7:10 John Bradford
  2003-09-03  7:38 ` Mike Fedyk
                   ` (2 more replies)
  0 siblings, 3 replies; 6+ messages in thread
From: John Bradford @ 2003-09-03  7:10 UTC (permalink / raw)
  To: linux-kernel, lm

> Tell me again that it is a good idea to screw up uniprocessor performance
> for 64 way machines.  Great idea, that.  Go Dinosaurs!

I suspect Larry is actually right that uniprocessor and $smallnum CPUs
SMP performance will remain the most important, but I don't agree with
his reasoning:

Once true virtualisation becomes part of a mainstream microprocessor
architecture, we'll start to see a lot of small ISPs wanting to move 4
or so 1U servers on to a single, 1U SMP box.  Server consolidation
saves money in many ways - physical LAN cabling is replaced by virtual
LANs, less network hardware such as switches is required, there is
less hardware to break, you can add a new Linux image in seconds using
spare capacity rather than going out and buying a new box.

Once the option of running a firewall, a hot spare firewall, a
customer webserver, a hot spare customer webserver, mail server,
backup mail server, and a few virtual machines for customers, all on a
1U box, why are you going to want to pay for seven or more Us in a
datacentre, plus extra network hardware?

You can do this today on Z/Series, but you need to consolidate a lot
of machines to make it financially viable.  Once virtualisation is
available on cheaper hardware, everybody will want $bignum way SMP
boxes, but no Linux image will run on more than $smallnum virtual
CPUs.

John.

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2003-09-08 20:14 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-09-03  7:10 Scaling noise John Bradford
2003-09-03  7:38 ` Mike Fedyk
2003-09-03 11:14   ` Larry McVoy
2003-09-08 15:38 ` 2.6.0-test4-mm4 - bad floppy hangs keyboard input John Stoffel
2003-09-08 18:03   ` Randy.Dunlap
2003-09-08 20:05 ` Scaling noise bill davidsen

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