On Tue, Nov 12, 2002 at 11:19:56AM -0600, [EMAIL PROTECTED] wrote: > I guess my problem is that it appears that there is some sort of throttle on > this, somewhere. That is, why doesn't the client saturate my ISDN line with > screen updates, instead of a "steady" 3KB/sec fpr 3 full minutes? Why > doesn't it behave the same way over my internal ethernet? It's not like it > "knows" there is a slower connection involved (I don't think it does, > anyway). So, if it takes 3 minutes to update at 3KB/sec over an ISDN line, > why doesn't it take that long on a 10BaseT connection?
ISDN has much more latency than Ethernet. While I haven't found X11 to be kindest on bandwidth, it's really nasty when latency goes up. The -C option should help this alot - I forward X11 displays over ISDN quite often using -C to ssh and it's quite nice. Another thing to consider is the network topology. Example: 1) I forward an xterm over ssh -C to my house, from work. This uses my 128k ISDN link. Things are snappy because there are three hops, no advanced traffic analysis - it's a simple topology. 2) I'm currently typing in an xterm forward from work to school. Work's upstream is 512K T1, school's downstream is multi-T3. This is *slower* than the ISDN setup because the traffic has to go through a much mroe complicated network - there's multiple routing hops, there's all kinds of traffic analysis and bandwidth limiters/load balancing systems here at school. It's still quite useable, but latency spikes of 500ms or so are common once or twice a minute. Since you're going from Texas to Tenessee, I'm willing to bet you've got a complicated topology to deal with. > >If you can, run your window manager on the display, not the remote > >machine. > > I believe the remote was connecting via Xterm from within an X session of > some sort, at least on Mandrake. THe other experiment was using WinAxeP on > a Winbox. Both exhibited this extreme sluggishness. If it was Mandrake I'd be concerned you were trying to do something crazy like start Gnome/KDE/Enlightenment. You should think twice about running anything more complicated than fvwm over an ISDN link. Have you tried the same experiment with an Xsession that just starts an xterm with no window manager at all? -- Ross Vandegrift [EMAIL PROTECTED] A Pope has a Water Cannon. It is a Water Cannon. He fires Holy-Water from it. It is a Holy-Water Cannon. He Blesses it. It is a Holy Holy-Water Cannon. He Blesses the Hell out of it. It is a Wholly Holy Holy-Water Cannon. He has it pierced. It is a Holey Wholly Holy Holy-Water Cannon. Batman and Robin arrive. He shoots them. _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
