>However, I have a few questions:
>- what are the bandwidth requirements? Is it something like 10 kbps or is it
>likely to use 100 or more? This is important to me, because I need to know
>how the application can work over the Internet.
Requirements is sort of a flexible term... It will run over 28800 modems,
but isn't very fast. If you are looking at that kind of bandwidth, I would
recommend http://www.tridiavnc.com and investigating the "Tight Encoding".
It will increase server load, but substantially decrease the bandwidth
needs. If you have 10Mbps LAN, the normal VNC works fine, though a little
laggy. At 100Mbps it is very smooth. The other concern for latency, which
is frequently more important than bandwidth, is server CPU and I/O power.
The screen must be pulled from the video card and processed, and
faster/newer machines can do this noticeably faster than older machines,
even over the same network connection.
>- how many simultaneous connexions can the server support? Will it crash
>with something like 10, 100 or more? By "crash" I mean slow the computer so
>drastically that no other application can be ran as well as simply crashing
>the system...
The screen polling should only have to be done once, and then the data sent
to all viewers. Since VNC is stream based, it will have a separate
connection for each viewer. It might be possible to make a UDP broadcast
tunnel, where one program connected to the server and the other end of the
tunnel connected to each viewer, and then the streams going into these
tunnels were broadcast to an entire subnet at once. For mass viewing, this
would dramatically decrease network bandwidth (by a factor of N-1, with N
viewers). I'm not sure if anyone has written such a broadcast tunnel or
not. It would be less useful (and very confusing) if 100 different people
were all trying to control the mouse pointer...
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