On Fri, Jul 11, 2003 at 10:39:18AM -0700, Alan Coopersmith wrote:
> Jay R. Ashworth wrote:
> >>>On Fri, Jul 11, 2003 at 03:03:59AM +0200, Rene Bartsch wrote:
> >>>>>From SUN I know you can close the X-session without stopping
> >>>>processes/programs/window-manager running on the server (just pull off
> >>>>your smartcard from one terminal and put it into another one and keep on
> >>>>working. The processes and window-manager have kept running in
> >>>>background on the server).
> >
> > Well, that's fine, but if the Xserver is on the terminal, and you want to
> > shut it down, I see no obvious way that you can keep all the clients
> > connected to it from falling over.  I'm not sure what Sun is playing at, but
> > I'm pretty sure it's not 'traditional X'.  
> 
> Actually it is.  It's the same Xserver that runs on normal workstations.
> The difference is a SunRay is NOT an X-terminal.  It's a graphical dumb
> terminal.  Conceptually, a SunRay is a video board and USB hub connected
> via ethernet instead of PCI/AGP.  The Xserver runs on the server machine,
> so a server with 200 SunRays has 200 Xsun processes running.

He didn't *say* SunRay.

That's another thing entirely -- almost exactly the same as Xvnc, from what I
understand.

> The magic of SunRay hotdesking (moving sessions from one terminal to another)
> is that as far as X is concerned, nothing changes.  The SunRay DDX handles all
> of that.  It keeps local backing store (ala Xvfb/shadowfb), and sends updates
> to the appropriate SunRay terminal.  If you pull your smartcard out of terminal
> A, it simply stops sending those updates and only updates the local backing 
> store.  If you then plug into terminal B down the hall, it dumps the entire
> backing store to terminal B, then goes back to normal operation sending updates
> to that terminal instead.

Yeah, that's almost 100% identical to what I set up with VNC for my client.
I used NIC's with a slightly modified boot CDROM as terminals, but they're
toast now of course -- but any acceptable pizzabox is around the same price.

I wonder what *Sun* charges for it?  It took me about 12 hours to design
*and* implement.  :-)

Cheers,
-- jra
-- 
Jay R. Ashworth                                                [EMAIL PROTECTED]
Member of the Technical Staff     Baylink                             RFC 2100
The Suncoast Freenet         The Things I Think
Tampa Bay, Florida        http://baylink.pitas.com             +1 727 647 1274

   OS X: Because making Unix user-friendly was easier than debugging Windows
        -- Simon Slavin, on a.f.c
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