[K12OSN] Slow speed

Sun Jan 23 02:00:50 UTC 2005

The video settings are on the server. The are in the lts.conf file. the video
settings are remarked out by default on the k12ltsp release. Just uncomment
the setting you want as the default. I am not at work so I can't check the
path for the file but I think it is  /opt/k12linux/i386/etc/lts.conf  

Hope this helps

On Sat, 22 Jan 2005 12:37:47 -0800, Dennis Daniels wrote
> Were you able to do that remotely? If yes, how?
> 
> thanks!
> Denny
> 
> Mark Raine wrote:
> > This may sound simple but we have noticed a big increase in speed by
> > decreasing the client resolution. just a thought.
> > 
> > 
> > 
> > On Sat, 22 Jan 2005 10:37:25 -0500, Jeff Kinz wrote
> > 
> >>On Sat, Jan 22, 2005 at 10:22:05AM  0100, Bjørn Roger Rasmussen wrote:
> >>
> >>>Now with K12LTSP as system the people at the school are complaining about 
> >>>the speed. High response time when they shall start or use normally 
> >>>programs etc.
> >>
> >>>Before I began to run K12LTSP I used Skolelinux 
> >>>school liked that solution, but it was a night mare for me to maintain the 
> >>>network. I did not get any complaint about the speed when I run Skolelinux.
> >>
> >>Does this mean that you used to run all your systems with local hard
> >>drives?  If so, then your current slowness problems is a result of
> >>either your network, or your server.
> >>
> >>
> >>>- Intel P 4 1.6 GHz, 1 GB RAM, 80 GB IDE harddisk WD with 8 MB cache. 100 
> >>>Mbit/s network.
> >>
> >>I suspect that since you have a 100 Mbit network, assuming all the
> >>thin clients are using 100 Mbit cards and not 10 Mbit cards, that 
> >>your problem is your server, not your network. Specifically you have 
> >>three potential weak points in your server.
> >>
> >>	1. For 10-15 X clients, 1 GB of ram is very minimal. 
> >>Depending on what applications are being run, you probably need more
> >>than that. How to find out: when all your clients are being used (really
> >>being used, not just logged in) run top and look at how much swap space
> >>is being used. If you are using a lot of swap that is an indication that
> >>you need more RAM. What window manager and applications are the clients
> >>running? Based on my past experience, you need at least 100 Mb of RAM
> >>for each client even when using a minimal window manager(icewm) and
> >>doing only internet browsing or word processing. This means that your
> >>server needs at least 1.5 GB of RAM and based in price points you would
> >>be better off going right up to 2 GB. Buying RAM in large chunks 
> >>costs less money, and if your client machines are doing anything 
> >>more than a minimal amount of work you will need more than 100MB per 
> >>machine.
> >>
> >>You may have heard reports of people running 40-100 clients with 
> >>only 1 GB of RAM.  This works ONLY when the client machines are not running
> >>X-Windows (being used only as telnet/terminal appliances).
> >>
> >>1GB of RAM should be about (USD) $100 - $150
> >>
> >>	2.  CPU 1.6 GHz isn't real fast.  Evaluate the output of top or
> >>other load monitoring tools to see if you can benefit from a faster
> >>CPU.  A 3 GHz P4 runs about (USD) $300.
> >>
> >>	3.  Disk.  If you are hitting the disk for swap space definitely
> >>upgrade your RAM first. Then, if the applications are still making heavy
> >>use of the disk, you may want to upgrade to a disk with more cache
> >>and/or a faster transfer rate.  SCSI and SATA are both generally better
> >>than IDE, albeit more expen$ive.
> >>
> >>	4. (4 of 3 :)  Network architecture - make sure all clients are
> >>running at 100 Mbits and not 10 Mbits.  Make sure all switches or 
> >>hubs repeaters, and cards are running full duplex mode.  Make sure 
> >>all the cabling is clean with no reflections (reflections cause 
> >>collisions and retries).   Run ifconfig on each client and the 
> >>server to see if any of your machines are seeing collisions.
> >>
> >>
> >>>The server shall serve about 10 [WINDOWS-1252?]– 15 thin client
computers. The thin client 
> >>>computers are old computers with specifications running from Pentium 166 
> >>>MHz with 64 MB RAM and better.
> >>
> >>-- 
> >>Linux/Open Source:  Your infrastructure belongs to you, free,
> >> forever. Idealism:  "Realism applied over a longer time period"
> > 
> > http://www.scaled.com/projects//
> > 
> >>http://kinz.org
> >>http://www.fedoratracker.org http://www.fedorafaq.org
> >>http://www.fedoranews.org
> >>Jeff Kinz, Emergent Research, Hudson, MA.
> >>
> >>_______________________________________________
> >>K12OSN mailing list
> >>K12OSN at redhat.com
> >>https://www.redhat.com/mailman//k12osn
> >>For more info see <http://www.k12os.org>
> > 
> > 
> > 
> > Mark Raine
> > Computer Services Coordinator
> > Tisdale School Division #53
> > mark at tsd53.ca
> > 306 873-2352  EXT: 505
> > 
> > _______________________________________________
> > K12OSN mailing list
> > K12OSN at redhat.com
> > https://www.redhat.com/mailman/listinfo/k12osn
> > For more info see <http://www.k12os.org>
> > 
> >
> 
> -- 
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Mark Raine
Computer Services Coordinator
Tisdale School Division #53
mark at tsd53.ca
306 873-2352  EXT: 505