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Terminal Server with Citrix

By Cranium2000 ·
Generally speaking and assuming 512mb RAM, what is the recommended maximum number of remote sessions that can connect into an NT Terminal Server at one time - all machines fully processing?

thanks!

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Terminal Server with Citrix

by TimTheToolMan In reply to Terminal Server with Citr ...

Hi,

Well from memory, the Citrix doco states you should allow 4Mb for each connection. I've always thought that was low and I expect you'll find the server runs out of horsepower well before you get to the hundred or so connections you'd get allowing some memory for the OS.

Remembering that the applications they run all run on that server, what will they be doing? If its at all CPU intensive, then It will be only a fraction of that number.

Cheers,
Tim.

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Terminal Server with Citrix

by Cranium2000 In reply to Terminal Server with Citr ...

The question was auto-closed by TechRepublic

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Terminal Server with Citrix

by shmaltz In reply to Terminal Server with Citr ...

Answer one is right 4MB is enough for each user. However you to take into account the fact that Windows itself is not in best shape when running only on 512MB. With the price of RAM being so cheap just dump in another 512MB.

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Terminal Server with Citrix

by Cranium2000 In reply to Terminal Server with Citr ...

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Terminal Server with Citrix

by DC1 In reply to Terminal Server with Citr ...

4MB per user for Citrix is correct but every connection to the NT server is treated as a NT Workstation so figure an additional 32 MB and necessary processor power also

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Terminal Server with Citrix

by Cranium2000 In reply to Terminal Server with Citr ...

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Terminal Server with Citrix

by sebeling In reply to Terminal Server with Citr ...

Starting with 512 megabytes -32 meg for the terminal server -12 for citrix metafram1.8 =468 if you divide by 4 in the worst case you are looking at 117. Personally I would round this down a little to 100 users and make sure you have some heavy duty processing power.

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Terminal Server with Citrix

by Cranium2000 In reply to Terminal Server with Citr ...

The question was auto-closed by TechRepublic

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Terminal Server with Citrix

by Shanghai Sam In reply to Terminal Server with Citr ...

Somewhat of a summary of the above:
Terminal Server ( not stripped ) = 64 megs
Citrix = 12 megs
Any other server service (like sql server, wins, dns, etc) = Allow for maximum ram

Per USER = 4 megs + (ram for each application they are likely to be running at normal utilization), IF the application is 32 bit. If 16 bit, allow for twice the ram od the application and twice the processor (nt and like os's run 16 bit stuff in an emulator).

So if you have only a single app, and it uses 20 megs of ram, you have 19 users, more or less - but you may exhaust your processor.

If you have this app PLUS ms office2000 and everybody has outlook open all the time and half the people run ms access half the time and the other half of the people run word half the time, you are looking at 4 megs + 20 megs + 8 megs (outlook) + 4 to 32 megs ( word or access) or 40 to 64 megs per user. That would be 7 to 11 users - maybe a little more on a good day.

If you runover the ram, everything gets real, real slow. The concept of counting ANY modern application and the rdp/ica connection at 4 megs dates from the original citrix release based on NT 3.51 and much simpler and less ram intensive applications. It is silly to plan an installation based on that figure - it assumes everyone will be running about the equivelant of notepad. Ram is cheap and critical to how the users perceive their speed.

In real life, if the users have ms office, an accounting app or three, ten or so different printers, some of them plugged into the client pc, internet browsing, connecting to an exchange server through outlook, etc., you are looking at 5 to 7 users. For 15 to 17 you'd need dual 933's or above, a good scsi raid and 1.5 gigs of ram. For a single application, given no other details about the application or the equipment, all I could provide is a guess.

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Terminal Server with Citrix

by Cranium2000 In reply to Terminal Server with Citr ...

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