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Re: [school-discuss] Ubiquity
FreeNX has persistence and beats the pants off VNC. IMHO, as servers
gain more horsepower, there's the chance that X on ltsp is superseded by
freenx on ltsp (ie the ltsp client booting not into an X session but an
freenx). It could be done now, of course, but X scales better (it takes
a bit of server resources for the nx compression).
VNC will get you a desktop while FreeNX will let you use interactive
apps like Flash and childrens' programs without being dumbed down to 8
While there are technical differences, the best way to describe FreeNX
is: VNC on steroids.
Java isn't ubiquitous enough (or efficient enough) for even normal web
apps which is why so much is written (this is my speculation) in
On Fri, 2006-10-13 at 06:11 -0700, lee wrote:
> ... or "Delivering consistent application experiences everywhere."
> ... Does LTSP have a VNC Java browser client?
> ... Is there a way to key sessions to users in LTSP so the session is
> persistent? That is, if a LTSP terminal bombs (VNC, PLE-bootable,
> etc.) can a user log back into the same X session?
> I ask b/c I've just taken a 2nd look @ VNC. VNC has long had a Java
> applet component pushed from the VNC server & w/ VNC, the X desktop is
> Which brings up another question: How restrictive is Java
> availability? Would it be reasonable to expect a reasonably-young
> version of Java to be available on 95% of the browsers a student might
> run into?
> WRT to security, UltraVNC has been around for 3-4 years w/ some very
> interesting VNC-oriented SSL & VPN-ish tools available (hmmm, & maybe
> some of which might have their own compression functions like ssh...).
> The bandwidth issue is less a concern in the USA, and the various VNC
> projects have done a lot to compress packets.
> I hope I don't come across as too dismissive of the bootable CD ... or
> the VPN USB portable apps ... they have their place, but I'm trying to
> evaluate where they'll have their limitations when restrictive
> environments. Each solution -- AJaX (fat, slow), SimDesk
> (proprietary), VNC/persistent LTSP, CD-bootable & USB-portable ... all
> these are going to have limitations.
> Maybe each solution is penultimate and what is needed is a functional
> suite of all three to create the perfect solution.. Taking Chris'
> idea, a bootable USB stick with a sync / temporary working file space
> in case the VPN component isn't available. The USB/CD-bootable distro
> will deliver more power & better integration & be a good way to VPN to
> a host school.
> I'm thinking about how web services have attained ubiquity and what
> toolsets will help a student (or any user) to have reliable,
> consistent tools wherever they go, with or without $100 laptops, etc.
> FWIW ... seven years ago I was running the VNC Java server from
> multiple X Deskops (using FVWM2) & having a grand time admin'ing AIX
> databases using Linux as a persistent client. At the time it was a bit
> costly in terms of CPU, and the Java screen rendering routines were
> still a bit rough around the edges
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