+ Post New Thread
Results 1 to 10 of 10
Thin Client and Virtual Machines Thread, Terminal Server >4GB RAM in Technical; I'm drawing up a spec for a terminal server. I'm looking for advice on how to address the memory requirements. ...
  1. #1
    meastaugh1's Avatar
    Join Date
    Jul 2006
    Location
    London/Hertfordshire
    Posts
    890
    Thank Post
    69
    Thanked 85 Times in 70 Posts
    Rep Power
    32

    Terminal Server >4GB RAM

    I'm drawing up a spec for a terminal server. I'm looking for advice on how to address the memory requirements. There will only initially be 30 odd clients, but I want to spec for more. I initially considered using 8GB RAM, with 32 bit Advanced 2003 with PAE. But having read about some issues with TS and PAE, this may not be suitable..? What are others running? Would you recommend 32 bit with, or without PAE, or just go for 64 bit? Is 64 bit likely to introduce lots of compatibility issues on top of those usually associated with TS, or will most 32 bit apps run in compatibility mode?

    cheers
    Mike

  2. #2

    Ric_'s Avatar
    Join Date
    Jun 2005
    Location
    London
    Posts
    7,590
    Thank Post
    109
    Thanked 762 Times in 593 Posts
    Rep Power
    180

    Re: Terminal Server >4GB RAM

    Would it not be better to have two servers with 4GB RAM each. By doing this you would add some redundancy.

  3. #3
    meastaugh1's Avatar
    Join Date
    Jul 2006
    Location
    London/Hertfordshire
    Posts
    890
    Thank Post
    69
    Thanked 85 Times in 70 Posts
    Rep Power
    32

    Re: Terminal Server >4GB RAM

    It would, but adding more memory is cheaper than an additional server. This is really a pilot to see whether thin client is suitable for other areas in the school (in terms of performance). I accept your point about redundnacy, and I would add more servers if I were to start installing a significant number of additional clients. Thanks

  4. #4
    kerrymoralee9280
    Guest

    Re: Terminal Server >4GB RAM

    @Ric_

    That makes more sense to me.

  5. #5

    Geoff's Avatar
    Join Date
    Jun 2005
    Location
    Fylde, Lancs, UK.
    Posts
    11,803
    Thank Post
    110
    Thanked 583 Times in 504 Posts
    Blog Entries
    1
    Rep Power
    224

    Re: Terminal Server >4GB RAM

    The real limit is the Kernel memory. In a system with 8GB running with the PAE switch, each user is still presented with 4GB of virtual memory (2GB for the applications and 2GB of shared kernel space). The users all share the 2GB of kernel space, thus it is the limiting factor. Adding more memory to the machine would provide more memory for the memory subsystem to address and utilize when the users' applications wish to place data into memory, thus the additional memory would help performance of the memory subsystem to a point in that it does allow more information to be kept in RAM rather than on the pagefile, but the users would still only have 2GB of memory addresses for use for their applications. The memory addresses given to the users will not change (this is the 4GB limit caused by 32-bit apps) regardless of how much physical RAM in the system.

    So, short and sweet, more physical memory will help to a point in that it gives the memory subsystem more memory to store application data, but it does not overcome the 2GB shared memory limit, nor does it provide more than 2GB of memory addresses to the users. Additionally, the 3GB switch would only worsen the matter by cutting the amount of shared kernel memory in half.

    Additionally, PAE support must be enabled in the application for it to function. If it does not, then your back to the above situation. Worse still, PAE uses double the amount of kernel memory vs normal memory allocation. Thus you actually cut your Terminal Servers capacity in half.

    In conclusion, if you must use 32bit apps. Use 4Gb with no /PAE and no /3Gb. Otherwise upgrade to 64bit.

  6. #6
    meastaugh1's Avatar
    Join Date
    Jul 2006
    Location
    London/Hertfordshire
    Posts
    890
    Thank Post
    69
    Thanked 85 Times in 70 Posts
    Rep Power
    32

    Re: Terminal Server >4GB RAM

    Thanks Geoff!

    So, if I were to use 32-bit applications on 64-bit Windows, would I still come up against the memory limitations of 32-bit?

  7. #7

    Ric_'s Avatar
    Join Date
    Jun 2005
    Location
    London
    Posts
    7,590
    Thank Post
    109
    Thanked 762 Times in 593 Posts
    Rep Power
    180

    Re: Terminal Server >4GB RAM

    @meastaugh1: You will not come up against the memory problem in 64-bit Windows and 64-bit is supposed to be REALLY nice for terminal servers. However, older software titles (also known as everything that you will find in a school)will tend to break when trying to run on a 64-bit OS. 16-bit apps will not run at all!

  8. #8

    Geoff's Avatar
    Join Date
    Jun 2005
    Location
    Fylde, Lancs, UK.
    Posts
    11,803
    Thank Post
    110
    Thanked 583 Times in 504 Posts
    Blog Entries
    1
    Rep Power
    224

    Re: Terminal Server >4GB RAM

    As Ric said, you wont. However your software is unlikely to run.

  9. #9
    meastaugh1's Avatar
    Join Date
    Jul 2006
    Location
    London/Hertfordshire
    Posts
    890
    Thank Post
    69
    Thanked 85 Times in 70 Posts
    Rep Power
    32

    Re: Terminal Server >4GB RAM

    Thanks both for your advice.

  10. #10
    linescanner's Avatar
    Join Date
    Oct 2006
    Location
    East Anglia
    Posts
    297
    Thank Post
    51
    Thanked 71 Times in 48 Posts
    Rep Power
    28

    Re: Terminal Server >4GB RAM

    We deploy large scale thin client system in schools.

    We always go for 4 GB boxes to run 30ish sessions. If you need more, add more tin. An 8GB box will not run double what a 4GB box does.

    In a school environment you are more likely to become proc bound than you are memory bound.

    I have a school in Herts running around 130 thin clients on Sun Ray. You are more than welcome to come and have a look.

SHARE:
+ Post New Thread

Similar Threads

  1. MS Terminal Server Sessions
    By Jonny_sims in forum Thin Client and Virtual Machines
    Replies: 6
    Last Post: 12th May 2010, 11:30 PM
  2. Terminal Server CALs
    By Norphy in forum Thin Client and Virtual Machines
    Replies: 2
    Last Post: 2nd July 2007, 09:33 AM
  3. Terminal Server
    By wesleyw in forum Thin Client and Virtual Machines
    Replies: 8
    Last Post: 26th February 2007, 01:03 PM
  4. HELP! RM Maths on Terminal Server
    By Kelyan in forum Thin Client and Virtual Machines
    Replies: 3
    Last Post: 4th December 2006, 02:05 PM
  5. Terminal server printing
    By Uraken in forum Thin Client and Virtual Machines
    Replies: 9
    Last Post: 1st December 2006, 03:57 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •