on Thu, Jun 09, 2005 at 11:19:32PM +0200, Damiano Verzulli (damiano@xxxxxxxxxxx) wrote:
> Daniel Howard wrote:
> >[...] convert our elementary school's network to support
> >LTSP/thin clients, one of the challenges we have is that due to
> >construction
> >[....]
>
> Please note that, while driving along the way of the LTSP/thin_client
> adoption, another challenge you might face with, expecially employing
> wireless-lans, it's the bandwidth!
>
> As the standard LTSP rely on the X protocol and the X protocol consumes
> lot of bandwidth, I think that with a 11Mbps links you could experience
> some problems!
My experience with ~9 clients on a 802.11b WiFi net, I found performance
for X was tolerable for basic work, though noticably laggy for graphics
(e.g.: GIMP). This with contention from web and file/print access over
the same segment.
For those comparing wired 10MB/s links, remember that WiFi is the
equivalent of hubbed, not switched, networks. And that there's the
security concern of a sniffable link.
> In order to avoid such problems and, also, in order to "improve" (a bit)
> the overall quality of the whole architecture, you should take a look at
> NX technologies (www.nomachine.com). It should be added to LTSP quite
> easily. Please note that the "core" of the NX architecture is
> _open_source_ and, as such, can be used freely. There're also a FreeNX
> project, somewhere on the web, that should embed all (and only) the
> open-source components of NX (but I can be wrong. Please check!).
>
> Please note that NX let user to access a central server via a graphical
> interface also with a standard 28.8 kbps modem. Something simply
> impossibile with standard X protocols.
Actually, not entirely, though it's pretty darned slow. Using lbxproxy
helps, as well as a very low overhead windowmanager, minimual updating
of screen (that means, e.g.: few performance meters -- most of the
WindowMaker dock apps update ~10x/s), and simple graphics (solid
backgrounds, non-gradient titlebars).
Peace.
--
Karsten M. Self <kmself@xxxxxxxxxxxxx> http://kmself.home.netcom.com/
What Part of "Gestalt" don't you understand?
One should remember that the Universe is large enough that unlikely
things happen really quite often.
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