[THIN] XenApp or XenDesktop?

  • From: "Minero, Hector B CIV NSWCDD, K55" <hector.minero@xxxxxxxx>
  • To: <thin@xxxxxxxxxxxxx>
  • Date: Thu, 5 Mar 2009 08:14:39 -0500

This brings up a question:

When should you deploy a XenApp (ICA) solution on Thin clients and when
should you deploy a XenDesktop solution?
I know cost may be an issue, licenses, etc. but performance-wise?
We've got Wyse TCs running ICA desktop sessions to Citrx servers and I'm
wondering if I would get better performance and better management if I
deployed XenDesktop or some other Desktop virtualization solution.

_______________________________
Hector Minero
NSWCDD K55
Ph:(540)653-8859


-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Christoph Wegener
Sent: Thursday, March 05, 2009 6:13 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: thin client deployment in a school


Hi Puneet,

Here are my quick thoughts:
Looking at the applications you listed, it would be recommended to  
have the applications executing on the desktop hardware rather than on  
a Terminal Server/XenApp Server.
Products like XenDesktop and Provisioning Server from Citrix might be  
applicable in this scenario to reduce TCO.
Especially Autocad will prevent you from deploying a Terminal Server  
solution as Autodesk prohibits by its EULA to run its Software on a  
Terminal Server. With the latest releases of AutoCAD you will not even  
be able to run the installer on a Terminal Server.

Citrix Provisioning Server can help you reduce TCO by having a single  
OS image for all desktops. So there is no need to patch 150 desktop  
separately. Adding application virtualization to the mix will allow  
you to dynamically compose your desktop images on the fly. This of  
course requires that all the applications you listed are compatible  
with application virtualization.
But as there are multiple competing vendors  
(Microsoft,Citrix,VMware,Symantec) in the application virtualization  
space, chances are high that you might find one or more products which  
will enable this scenario for you.

If you still want to use a Terminal Server scenario, then you should  
do a thorough analysis of the computing resources that all of your  
application requires. This then gives you an idea about the  
scalability and efficiency of your targeted architecture. I would  
assume that applications like Photoshop may require huge amounts of  
RAM for each user session. Therefore a worst case scenario could be  
that you can only support about 5-10 Photoshop user sessions on a  
single Windows 2003 Terminal Server instance. To maximize efficient  
use of hardware scalability you could then look at running multiple  
virtual OS instances on a single server with say 32Gb RAM to pack  
40-80 Photoshop user sessions on a single physical server box.

Additionally, if the students are going to use the 3D modeling  
features of some of the applications, then the currently available  
server CPUs won't be sufficient and you might want to look at an  
external GPU.
Citrix Systems has a Technology Preview of it's project Apollo  
available which is targeted at delivering 3D applications via ICA:
https://www.citrix.com/English/ss/downloads/details.asp?downloadId=13409
63&productId=163057

Hope this helps :)

Christoph

On Mar 5, 2009, at 8:36 PM, Puneet Goel wrote:

> Hi,
>
> I have to deply thin client in a school for around 150 students. They 
> will be working on advanced IT apps like 3D Max, Maya, Autocad, 
> Photoshop, Oracle, SQL.
>
> can anyone guide me in finalizing server requirements for them.
>
> thanks
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