[THIN] Re: Advantages of single over dual processors

  • To: <thin@xxxxxxxxxxxxx>
  • Date: Thu, 18 Dec 2003 08:54:24 -0600

Ahh get smart greg..... Let them login in and write a time stamp into
the home dir. Check it at login and if it is within 60 seconds of last
one they don't get logged in due security risk :-)

NOW as to Documents. You need to try google. I did a search for 

dell adding a processor performance Citrix
 And the first link was a doc from dell comparing single dual and quad
Called "User Capacity for MetaFrame Servers".

Throw in Compaq instead of dell and I get:
http://www.go-eol.com/whitepapers/pdfs/DL580.pdf

Change to HP
http://activeanswers.compaq.com/ActiveAnswers/Render/1,1027,4825-6-100-2
25-1,00.htm
http://www.computerworld.com/hardwaretopics/hardware/server/story/0,1080
1,63431,00.html

So what I am saying is that with a little searching you can find a ton
to support almost anything. 



Ron Oglesby
Senior Technical Architect
 
RapidApp
Office 312.372.7188
Mobile 815.325.7618
email roglesby@xxxxxxxxxxxx
 

-----Original Message-----
From: Greg Reese [mailto:GReese@xxxxxxxxxxxxxxxx] 
Sent: Thursday, December 18, 2003 8:43 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Advantages of single over dual processors

don't get me wrong, I want duals.  It just opens up a problems for me.
When my users figure out one server is faster than the other.  They keep
logging in and out of the farm until they get the fast server.  That
causes its own fun.  Or they call and pester me to do them a favor and
always direct them to the "good" server.  I would really like to buy
1ghz processors again but that is no longer possible.

Greg

-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]On
Behalf Of Ian Aston
Sent: Thursday, December 18, 2003 9:38 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: Advantages of single over dual processors


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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