>From Ben Forta's book and I quote "In Windows NT, you get diminishing
returns for each additional CPU. Turning a one-CPU system to a two-CPU
system improves performance by only 70 percent, even if the two processors
are identical. The third CPU adds only another 30 percent, and the fourth
adds only another 15 percent boost." They didn't mention software issues
they only mentioned hardware issues, I am sure they know the prices of
software.
Robert Everland III
Web Developer
Dixon Ticonderoga
-----Original Message-----
From: Judah McAuley [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 11, 2000 2:19 PM
To: [EMAIL PROTECTED]
Subject: RE: Processor Question
At 12:42 PM 5/11/2000 -0400, you wrote:
>Well with database more RAM is always better. Though on the list it has
been
>posted many times that if you're going to get a multiprocessor do 2
>computers with 2 processors instead of one 4 processor. Not only do you get
>clustering, but the performance increase of a 4 processor isn't much only
>25% over a 2 processor where a 2 processor is 50% over a one processor.
>
>Robert Everland III
>Web Developer
>Dixon Ticonderoga
I'm suspicious of those processesor increase numbers. I know that the
performance increase isn't linear, but it should be a heck of a lot better
than what's quoted above. I would also point out that cost may be a
factor. Just comparing hardware prices, a 4 processor box and 2 two
processor boxes may end up being comparable in price, but if you factor in
hosting space costs, maintenance/management costs, and software licensing
fees, then a 4 processor box starts to look attractive. Costs really start
to mount when you start looking at the licensing for Spectra ($15,000 per
box up to 8 processors).
Judah
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