On Sun, 2002-09-15 at 07:34, narayanan viswanathan wrote: 
> 
> Hi all,
> 
> I have configured the diskless workstation and at present
> it is running nicely with linux as the OS. Now I have an
> NT Server also and I want my diskless workstation to run
> NT OS instead of Linux. Is it possible? If possible please
> let me know what is the procedure involved.

I started off trying to answer this question.  However, I can see four
different interpretations, and I've wound up with something that sounds
more like an invitation to discuss the merits of LTSP.  I would like to
hear what people think about this, especially on any mistakes I've made.


Here are four different answers to your question:

1. You want to run Windows programs under LTSP:
You can do this with Wine.  Wine is included in several distributions. 
However, it can't run all Windows programs, so sometimes #2 or #3 is
necessary.

2. You want LTSP workstations to connect to a Windows Terminal Server:
Use rdesktop.  You can find this with Google.  You can get Windows TSE
from your local Microsoft dealer.

3. You want to use LTSP workstations with Citrix:
Use the Citrix ICA.  You can get this from Citrix.com when you buy the
Citrix server.

4. You want to boot Windows over the network on diskless workstations.
This is a bad idea; don't do it.  Compared to simply installing Windows
on regular PCs, you won't save money, it will take more time to set up,
and it's more complicated to keep working.

Linux supports remote displays natively.  In other words, all components
needed for LTSP (or a similar setup) exist in almost any Linux
distribution.  The software and protocols used are public, well
documented, and freely available.

NT does not support remote displays natively.  If you want remote
displays with any Microsoft server, you need a special version of
Windows (Windows Terminal Server Edition) or a special program
(Citrix).  These use proprietary protocols to communicate with the
clients.

Windows isn't designed for use on diskless workstations and makes
assumptions that aren't true in this kind of system.  Remember that
Windows' roots lie in the Disk Operating System; it's designed to make
full use of disks.  The LTSP software was designed from the kernel up to
work in RAM as much as possible, reducing dependency on the disk images
on the server

Second, you won't save anything with licensing.  Linux licenses are free
(you pay for support, not the right to run it), but Microsoft requires
you to pay a fee for each machine, even diskless ones.

Third, LTSP will run on very low-end hardware while Windows requires far
more powerful (and by extension, more expensive) hardware.

Fourth, LTSP centralizes administration.  Booting Windows over the
network will let you centralize somewhat, but not nearly as much as
LTSP.

Fifth, I believe network bandwidth requirements are higher.  However, my
experience with this is several years old, and it's possible that
Microsoft has improved things.  Would someone with more recent
experience booting Windows over a network please confirm or deny this?  

If you must have local Windows on the desktops, just installing Windows
on each machine is the least expensive option.  However, given that
Windows TSE will work with LTSP, I can't see why you might need this.

-David


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