[THIN] Re: Advantages of single over dual processors
- From: Ian Aston <iaston@xxxxxxxxxxxxx>
- To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
- Date: Thu, 18 Dec 2003 14:38:07 -0000
Not really Greg... it does confirm most of what I am thinking myself. I
would prefer small redundant servers, ie 2 * 1.8ghz procs (or whatever is
the speed at the time), 2GB RAM, 1 * SCSI disk.... these are quite cheap at
the moment, but I need to be able to quantify and substantiate my arguments
with facts.
Thanks,
Ian
-----Original Message-----
From: Greg Reese [mailto:GReese@xxxxxxxxxxxxxxxx]
Sent: 18 December 2003 14:24
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Advantages of single over dual processors
but does that come back to you with the added speed of a single 2.4ghz
processor vs 2 1ghz processors?
I am in the same situation here. I currently have 2 main servers for
terminal services deployed, both with 1ghz p3 processors (not xeon). The
new server I am looking at is a single 2.4ghz p4 Xeon.
Greg
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]On
Behalf Of Braebaum, Neil
Sent: Thursday, December 18, 2003 9:18 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Advantages of single over dual processors
> -----Original Message-----
> From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]
> Sent: 18 December 2003 13:51
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: Advantages of single over dual processors
> >
> > Well if nothing else, with single CPU machines - every CPU
> > has to run an instance of the OS. With duals, at least you
> > remove some overhead, with little penalty on scaling.
> >
> > Neil
>
> I *think* I understand what you are saying, but not completely...?
As well as what Angus has said - for a farm of single cpu terminal
servers, every server has to run an instance of the OS - therefore each
CPU=OS running.
With duals (or greater for that matter), you have one instance of the OS
per machine, and additional CPUs for other load - therefore not the same
degree of OS overhead per machine - therefore the effective OS penalty
per CPU isn't there with duals.
In addition, scaling of the OS is fine with duals - and to be fair, with
greater number of CPUs, depending on types of applications used. I'm not
saying 8 ways or bigger make the best choice of machines for terminal
server implementations, but up to around 4 CPUs can make sense for
bigger user audience counts.
As it is, though, the current rationale of duals making a lot of sense
is true - with single CPU servers, you are taking a greater hit for OS.
Neil
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