[K12OSN] K12LTSP Over Dialup

Fri Jun 11 20:34:10 UTC 2004

On Fri, 11 Jun 2004, Jim and Kelly Younkin wrote:

> I found this on Windows 2003 Terminal Server.  20K is a bandwidth I
> could live with, though I need to find out more details of what else is
> necessary.  I really thought Linux would have something in this range.
>
> >> Depending on your configuration individual RDP sessions should use
> between 11K-20K per session.

Right, and you can "run" win2k on p1 133 with 64K memory. take the minimum
specs from MS with a big grain of salt. julius

>
> The following document from Microsoft should help.
>
> http://download.microsoft.com/download/5/8/c/58ccf087-33c1-41b2-bb74-ee2
> 0be37fde6/TermServScaling.doc<<
>
> -----Original Message-----
> From: k12osn-bounces at redhat.com [mailto:k12osn-bounces at redhat.com] On
> Behalf Of Petre Scheie
> Sent: Friday, June 11, 2004 3:46 PM
> To: Support list for opensource software in schools.
> Subject: Re: [K12OSN] K12LTSP Over Dialup
> Importance: Low
>
> Even at 200k, that's at least four times the bandwidth you'll ever get
> with
> dial-up.  LTSP isn't the same thing as VNC.  LTSP loads the client's
> whole
> operating system over the wire, whereas VNC uses a special program on an
> already
> running client machine to allow the server to just transmit streamlined
> screen
> updates.  You don't want to try LTSP over dial-up; your users won't
> accept it.
> I'm not even sure how you'd get the client to dial the phone to make the
>
> connection, as to do so would require an OS to already be loaded on the
> client
> to control the modem, etc. And VNC over dial-up is only so-so; it beats
> driving
> in on the weekend to tend to a box, but it pales compared to actually
> being
> there, and I doubt regular users will find it tolerable.
>
> Petre
>
> Jim and Kelly Younkin wrote:
> > This statement makes me wonder about LTSP:
> > " The whole concept of thin clients requires a fast connection to the
> > server to work.  "
> >
> > Here is something I read about using VNC with Linux:
> > "You would be shocked at how little bandwidth is required to do such a
> > thing. For efficiency disable all screen savers and set the desktop
> > background to a neutral wallpaper with no fancy stuff. I run on
> machine
> > with 120 users on it and the bandwidth used is about 200k average. X
> is
> > incredibly efficient as long as you can keep the necessary screen
> > refresh rates down by not running too much eye candy."
> >
> > -----Original Message-----
> > From: k12osn-bounces at redhat.com [mailto:k12osn-bounces at redhat.com] On
> > Behalf Of Les Mikesell
> > Sent: Friday, June 11, 2004 11:35 AM
> > To: Support list for opensource software in schools.
> > Subject: Re: [K12OSN] K12LTSP Over Dialup
> > Importance: Low
> >
> > On Fri, 2004-06-11 at 10:18, Jim and Kelly Younkin wrote:
> >
> >>I am new to Linux, but I have a project that I believe would be
> >
> > perfect
> >
> >>for it and my research has pointed me to K12LTSP as the distro that
> >
> > will
> >
> >>work best, however I have a question about running the thin clients
> >
> > over
> >
> >>a dialup connection.
> >>
> >>I plan to have about 20 remote offices set up as thin clients, with a
> >>dialup connection to a K12LTSP server.  They need to be able to have
> >>internet access, e-mail and office software.
> >>
> >>Is performance going to be unbearable over a 56K dialup?  What server
> >>hardware would you recommend for this project?
> >
> >
> > The whole concept of thin clients requires a fast connection to the
> > server to work.  If you only have one person at each office,
> > consider some other topology.  If you have several people at each
> > office it would work to have a suitably sized local server and
> > several thin clients at each.  If you just want to avoid
> > software installs at the remote site you might run a live-CD
> > linux version like Knoppix.   56k is OK for occasional email
> > transfers or working in character mode.  It's not fast enough
> > to run typical GUI programs over or even loading/saving data
> > for everyday use.  You'll either want DSL/cable modem speeds
> > for each office, or do most work locally, or special applications
> > written with low bandwidth in mind.
> >
> > ---
> >   Les Mikesell
> >    les at futuresource.com
> >
> >
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