Color depth

[Oliver Grawert]

hi,
On Di, 2005-11-15 at 18:50 +0100, Reiner Schmid wrote:
> I ´ve been testing  edubuntu-ltsp for some days in reality (classroom). It is an adventure.
cool :)

> Seven clients were able to work at the same time, but if there was one more PC, different problems appeared:
...
> Then I watched the prozessor load on the server (1 GB RAM). And the scale was about 100%
according to a table jonathan sent to this mailing list with memory
usage values, you need about 100-128Mb per client desktop on the server
(some more with additional heavy applications like openoffice) plus some
memory (256? Mb) for the server itself, so i guess your system started
heavy swapping with the eighth client which might affect the CPU usage.
what kind of CPU does this server have ?

> Now I will reduce the color depth to 15 (32000 colors) to reduce network traffic.
> I think the color scale will be sufficient for working. 
i'm really sorry we didnt change this earlier, classic LTSP reduces the
colorpalette by default to 16bit, we will reduce the default setting for
it as well in dapper.

> Also I want to send the teacher screen from the server to the clients in future. I tried this with full color (24 bit) with one 
> excellent server (AMD64) and one (1!) small client at home a few days before. There was no chance to start openoffice during the vnc-session.
yes, vnc is quite a network hog ...
hopefully freenx will be fixed in time to be shipped with our next
release, the needed codechanges were promised by the freenx people two
years ago and stil havent happened, but the fact that we had one of the
freenx contributors at the conference in montreal gives some hope it
could finally happen ...  i'd like to embed the client into
student-control-panel 

> Perhaps can somebody adapt the ed(unbuntu) backgrounds (fullcolor) to a lower color level?
see http://art.ubuntu.com/ you can also switch to a plain colour
background.

ciao
	oli
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