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New Terminal Server Farm setup scenario

BIG QUESTION HERE.  I'll try to give out as many points as I can.

Here is the scenario.

I work for a software publisher and we are looking for a way to quickly "WEB" enable our legacy software product.  We are currently working on a true web version, but that is quite a way off. (1-2 years).  So we are now looking at using a Citrix solution so our customers can run our software without having to install in on their servers and networks (if they even have one).   Within six months we should have around 300 users on our servers, and about all of them will be on all work day consitently using the software, printing, and even scanning documents into the database.  Each company that has users on our servers needs for their data to be separate, invisible, and unaccesible to the other companies.  We are starting this from scratch so no need to worry about what our OS is and all that.  I'm sure that we'll install Windows Server 2003 R2 on the servers.

1. How many servers do you think I'll need?
2. Which Citrix products will I need?
3. Will the Terminal Services External Connector Licence work in this scenario?
4. Any third party products?
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valrog
Asked:
valrog
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1 Solution
 
mcsweenSr. Network AdministratorCommented:
I host my current ERP system through Windows 2003 Terminal services using 2x Application Server, 2x Load Balancer, and 2x Thin Client Server.  These 2x products are soooo cheap and work soooo well.  Try out the demo of this software, you'll ask yourself how you ever did terminal services without it.  The new version will also allow you to publish the client to a web page.  This works like a champ!

As far as number of Terminal Servers have a look at this doc:
http://www.microsoft.com/windowsserver2003/techinfo/overview/tsscaling.mspx

Unfortunatly I don't know a lot about Citrix since we never saw the need to use it.  Seems to me that it's only really usefull if you need a lot of bells and whistles.

Yes, your terminal services external connector license will work.

In my configuration I use (2) Dell Poweredge 1850 with Dual PIV Xeon 3GHz Procs, 2GB RAM.  We have about 100 simultaneous connections.  The application we run is called Syteline and is pretty resource intensive.  This is Terminal Servers only, there is a middleware componet that runs on a seperate server and SQL is on another dedicated box.
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mcsweenSr. Network AdministratorCommented:
forgot links

http://www.2x.com/applicationserver/
http://www.2x.com/loadbalancer/
http://www.2x.com/thinclientserver/


Thin client server works well if you have old machines you want to use as thin clients.  In my setup I use as low as P2 400 with 64mb of RAM and no Hard Drive via PXE boot.  The boot image is about 10MB.  These machines run like champs as thin clients.
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valrogAuthor Commented:
Since no one else has chimed in I'm going to give mscween all the points.   Thanks for pointing out that software.  I think we're going to go with Citrix Presentation Server 4 Advanced since it can do local TWAIN mapping.  Our software product lets people scan in documents related to a record, and this is a huge concern for scanning.
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