Interesting. So you think NX it's not worth to take a look at NX? At least we got all programs in a usable condition now.
2009/8/12 Antoine Migeon <[email protected]> > > NX and Maple don't work fine... I think the problem is SSH with Java (but I > have not tried NX without encryption) NX is good but for other applications. > > That is why we are still using XDMCP on most client. > > > Antoine > > > Frank Bergmann a écrit : > > Java should work quicker via NX-Connection. > So you could install the freenx Server on your sever and a fat client > that boots a small desktop und autostarts the nomachine client. > Maybe you should test this first: Boot a client from cd, install > nomachine client and see how it goes. > Frank > > 2009/8/12 Peter Stein <[email protected]> > > > 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 > > > ------------------------------------------------------------------------------ > 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 > > > > ------------------------------------------------------------------------------ > 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
