Compiz is disabled. LDM_DIRECTX didn't help. Video drivers are ok, I use the free radeon drivers, they are well tested. How should I install such software as Maple, Mathematica locally ... This software needs some kind of computer power. The programs are huge. That's why we have our workstations and not a thin client. Unfortunately this doesn't look like a good plan. So what is left?
2009/8/11 Gideon Romm <[email protected]>: > Peter, > > You have several options available: > > 1. LDM_DIRECTX (set to True in lts.conf, video will not be tunneled > through ssh and go back to the client directly) > > 2. LOCAL_APPS - install java and java programs in the chroot and run > them as local apps rather than from the server - do the same with ff and > plugins > > 3. See if you have the optimal video drivers for the thin client > > 4. Disable compiz if it is running on the server > > These are off the top of my head. > > -Gadi > > > On Tue, 2009-08-11 at 18:34 +0200, Peter Stein wrote: >> Dear LTSP users, >> >> when it comes to convince somebody of LTSP the usability and feeling >> is crucial. After setting the chroot up we started testing. And here >> the real problems begin. Our users are scientists, they work for hours >> in front of their monitor and they are *sorry* pissed if the computer >> is somewhat sluggish or unusable. >> We have enormous problems using Java programs like xmaple and others. >> Some are usable, some not. I am aware of the bug here >> https://bugs.launchpad.net/ubuntu/+source/ia32-libs/+bug/277069 and >> installed the libxcb package of Ubuntu karmic which improved the speed >> a lot. But still it sucks to work with thin clients somehow. >> >> - moving windows is sometimes decelerated >> - firefox dropdown menus still open slowly sometimes (not in konqueror) >> - input in some java programs like xmaple lags - the program is not usable >> - videos are not shown with enough fps >> >> I have analyzed the traffic a little bit. If you move a window like >> gnome-terminal traffic jumps to 5-6 MB/s sometimes. CPU of xorg goes >> up to 45%, ssh uses 20%. If one uses xmaple or other Java programs >> load goes up to 1.15 which is too much for a single core terminal, >> traffic jumps to 14-15 MB. This is more than maximum for a 100 MBit/s >> connection, which is still kind of standard (but tested with GBit/s). >> >> We use: >> Ubuntu Jaunty for servers and chroot >> terminals have sempron 2100+ (that's not really slow for a terminal) >> ATI X1200 with free radeon driver >> the server I used for testing has more than enough power: 8 cores and 16GB >> RAM >> >> I also tried hpn-ssh http://www.psc.edu/networking/projects/hpn-ssh/ >> with no sufficient result. >> So the problem is: >> >> In many cases (like moving a window etc.) xorg and ssh use too much >> cpu. We changed ssh encryption to blowfish which helped only a little. >> What can I do to improve this situation. I ran out of ideas. One >> important program which doesn't work, is enough to make this project >> rubbish. All my work was for nothing and that would be very >> disappointing. >> >> Thank you very much. >> >> >> >> Peter >> >> ------------------------------------------------------------------------------ >> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day >> trial. Simplify your report design, integration and deployment - and focus on >> what you do best, core application coding. Discover what's new with >> Crystal Reports now. http://p.sf.net/sfu/bobj-july >> _____________________________________________________________________ >> Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: >> https://lists.sourceforge.net/lists/listinfo/ltsp-discuss >> For additional LTSP help, try #ltsp channel on irc.freenode.net > -- > -------------------------------------------------------- > Gideon Romm | Proud LTSP Developer > [email protected] > > Support LTSP! Buy your hardware at: > > www.DisklessWorkstations.com > www.DisklessThinClients.com > > (use coupon code: LTSP5P for 5% off thin clients from DisklessThinClients.com) > > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day > trial. Simplify your report design, integration and deployment - and focus on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > _____________________________________________________________________ > Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: > https://lists.sourceforge.net/lists/listinfo/ltsp-discuss > For additional LTSP help, try #ltsp channel on irc.freenode.net > -- Agnes-Bernauer-Strasse 53b 80687 Muenchen Mobile: +49-176-61576306 ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _____________________________________________________________________ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
