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RE: [K12OSN] Stability of K12LTSP

The HP ProCurve 4000 switches are 3.2 GB/sec backplane.  We have three of
them here with a fiber mesh as a backbone.... Great pieces of equipment... I
can go pull 2 of 3 fibers right now and not interrupt traffic significantly.

If you have some extra cash you could add a gigbit module to the procurve
and get a gigabit network adapter for the server.  The gigabit module isn't
cheap though.  Neither is the fiber module.


-----Original Message-----
From: Jack [mailto:jackpal cfl rr com] 
Sent: Friday, July 26, 2002 4:27 AM
To: k12osn redhat com
Subject: Re: [K12OSN] Stability of K12LTSP

Thanks for the replys everybody.  Its nice to know there is a very active
community attached to k12ltsp.  So far I have not set up any terminals but I

have completely designed the infrastructure on paper.  I work in IT for a 
large company by day and I have been working the rest of my time for the 
school.  I've been particuarly interested in the trunking of the network 
cards.  I'd like to do this for the backbone of the network.  The problem I 
see is that most of the switches (except for the expensive ones) do not 
support any more than 100mb transfer on thier backplane.   How does adding 
and trunking another card help ease the load?

 I was hoping to use KDE as the desktop.  I think I can get away with this 
because I am limiting the number of terminals to 20 per X11 server.  I
wait to try.  Our rollout here is in 3 weeks and the cable is just going in 
place.  I still expect to meet the deadline but one thing I am concerned 
about is finding parts for some of the terminals.  Does anybody know a good 
source for PCI video cards?

 I am also glad to hear the kids like the terminals but to tell the truth I 
think the teachers are really going to be the problem.  The computer teacher

I have not even met yet.  I am worried of the acceptance.  Even though its a

great system its different and users don't like different.  Even still I
alot of enthusiasm for this project.  

On Friday 26 July 2002 12:04 am, Caleb Wagnon wrote:
> Hi Jack.
> 1. 50 megs a client is the rule of thumb, of course different apps and 
> window managers make all the difference in that number. I'm running A 
> Dell Poweredge 1.8 ghz Xeon with 4 gigs of ram for 60 terminals. I'm 
> using the icewm-lite (KDE is too bulky) package along with abiword and 
> galeon and it works fine with this setup. I did have to add another 
> network card and do some port trunking due to a network bottle neck 
> after 30 machines or so.
> 2.  The building housing our big ltsp has an isolated hp procurve 4000 
> dedicated just to those terminals. I'm using the standard network 
> configuration for ltsp. You could also setup a vlan. I don't know how 
> serious the effect of all that traffic is, if at all. The thought of 
> all that traffic being set loose on my 100mb network terrifies me 
> though.
> 3.  I was still playing last year. My official rollout is August 15th. 
> The students got to play on them some last year and they loved them. 
> To them technology is technology. The teachers are having workshops 
> and these terminals are gonna be part of that. So we'll find out soon 
> the reactions!
> 4.  I have been playing, but no success. I think everyone has decided 
> it's something deep inside of kde3 and its deeper than I want to go.
> Caleb Wagnon, MCP
> Fordyce School District
> Office of Technology
> Fordyce, AR 71742
> (870) 352-2968
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