[K12OSN] Experience at Glenburn this week.
ddaniels at magic.fr
Thu Sep 2 00:31:06 UTC 2004
Can I post the keys bits of this conversation to a couple of wikis?
Searching the Redhat archives is a lesson in futility unfortunately, so
I'm trying to capture what I can in documentation.
David Trask wrote:
> "Support list for opensource software in schools." <k12osn at redhat.com>
>>Thanks, I will try a different session type. So, are you finding a
>>noticeable speed increase with IceVM? We had a good time this week. But,
>>now I think I need to get better a tweaking the process.
>>Our server is 2 xeon processors, somewhere over 2.5 gig, and 4 Gig of
>>memory., we had a lab of 28, a lab of 14, and a lab of 7 this week. Most
>>times we had about around 35-40 teachers on at the same time. For the
>>most part we go good performance. A couple of the major issues
>>1) Occassional Lockups -- some of the orphan process variety, where if I
>>logged on as root, I could see the user's process, using the ps -u
>>username command and I could kill processes to get them unlocked
>>But the problem lockup was when I did a ps -u username command and nothing
>>showed, yet the user's station was locked up. At that point we did reboot
>>the specific client. But, while it wasn't terrible, we did get a couple
>>to 3 per 1 1/2 class session. And then sometimes we got a person who just
>>seemed to lock them up several machines in a row, and that was after I
>>check to see if they had active processes before they logged in again.
> Have you enabled "purge-users"? Go to /opt/ltsp/templates/k12linux and
> run the gdm-kdm purge user script....also open it in a text editor and it
> will tell you that you need to go to /etc/sysconfig/k12ltsp and change the
> line about purging users from "no" to "yes". It kills any remaining
> processes when a user logs off or when they do a terminal reboot. Very
> cool. We had a lengthy discussion about it and the list basically came up
> with it (with Eric's help of course) after trying several other
> "not-so-nice" methods.
>>2) Some slowdowns. We hit a wall today when we were teaching First Class,
>>I couldn't even log on the main server as root it go so slow. I had to
>>have one lab log off and just watch the instructor demonstrate. I wish
>>they would upgrade the Linux First Class beta client, wow is it buggy, but
>>our staff lives and dies by first class. And the web version is still
> The web version of 8.0 is awesome...looks just like the client...you
> gotta' check it out! I agree...in 7.1 the web interface is clunky, but in
> 8.0 it's very slick. You have a desktop and everything! PS. Version 16
> beta is less crash prone than version 17.
>>Maybe we should switch to icevm. I hate to switch the faculty after this
>>great week of work, but I guess they mostly use the education menu, Open
>>Office, mozilla and First class, so if I modify the IceVM menu to reflect
>>those, we would be in good shape.
> You can modify IceWM to your hearts content....use IceMC 'icemc" already
> should be installed. Disregard the first error message and navigate to
> /usr/share/icewm and edit the menu file. Very cool. I also like IceCC
> or icecc google and download it....it too is slick.
>>other "best practices" tips to improve server performance.
> Use gigabit! Do you have gigabit cards in the server? If not you NEED
> them. Are you coming out of the server and into a gigabit switch? If not
> you NEED to! The difference is astronomical! Amer.com has great deals on
> gig switches and gig uplink switches.....I use several of the SR24G2
> David N. Trask
> Technology Teacher/Coordinator
> Vassalboro Community School
> dtrask at vcs.u52.k12.me.us
> K12OSN mailing list
> K12OSN at redhat.com
> For more info see <http://www.k12os.org>
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