[K12OSN] OOserver?

Julius Szelagiewicz julius at turtle.com
Fri Apr 16 12:59:07 UTC 2004

On Fri, 16 Apr 2004, Les Mikesell wrote:

> On Fri, 2004-04-16 at 01:18, Thomas Ryan Gordon Sr wrote:
> >  If k12ltsp was on box 1 and the system was being heavily taxed
> > | by open office use (just as an example) how can one attach a second
> > | box (box 2) so that all instances of openoffice run on box 2 but
> > | appear on clients served by box1, so that the resources used by
> > | openoffice primarily tax box 2?
> >
> > you would use rsh or ssh to forward the X.  make sure there is plenty of
> > bandwidth between the two boxes.
> There is a big difference in what happens with rsh or ssh when
> your $DISPLAY is already on a different machine than where
> the command is issued.  Ssh makes a fake local $DISPLAY on
> the remote side that is transparently port-forwarded back
> to the machine where the command was issued over the encrypted
> connection, then sent on to the original $DISPLAY.  That means
> that the server running the window manager that you were
> trying to off-load is still involved.  With rsh, your
> original $DISPLAY is passed along or you would set it
> explicitly to point to the thin client.  Then when the
> program starts it will make it's own connection to $DISPLAY
> completely independent from the connection where the
> command was issued.  Rsh is less secure but off-loads more
> of the work.
	allow me to elaborate on your points: 1. rsh is not so much "less
secure", but "totally insecure" seems to describe it well. 1.a to run rsh
you need to open the access to the terminal display and keyboard.  this
may, or may not be a concern. 2. the additional load caused by ssh is
negligible compared with the load of running oo. 3. depending on the
balance between processing power and bandwidth you can adjust ssh
compression to taste.
	my $.02, julius

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