On Mon, 2004-08-09 at 23:05, Nuno Tavares wrote:

> Of course, you can have as many DHCP servers as you want, but that's not
> load-balancing, but rather failover - the clients will connect to the
> first server to reach the clients. However *all* the servers respond to
> the client. Usually, the client gets the
> most-powerfull/geographically/phisically nearest server - which
> confirms you are not doing dynamic load-balancing. That's almost the same
> as splitting the DHCPD range amongst all servers, so each one has a static
> subrange assigned.

Of course, DHCP assignment doesn't have to determine the client's
eventual XDMCP host. It's quite possible to use broadcasts for the
clients, so they get an XDMCP session from the first server that
responds (aside: is there any way to make servers delay their response
based on their load level, making it more likely to connect to a less
loaded server?). You can also set things up so that a chooser is
displayed and the user can pick which of the responding XDMCP servers to
connect to.

While I don't have a use for it personally (I'm currently begging the
boss for the cash for even an underpowered cold spare server), I wonder
if there might be a need to start documenting this side of things. No,
I'm afraid I'm not volunteering - my documentation writing abilities are
stretched enough trying to write the odd (poor) bit for the Cyrus IMAPd
people.

There's clearly significant (growing?) interest in issues with scaling
LTSP setups and improving availability. I know there was a fairly big
discussion about it a while ago, but IIRC it was directed toward a
fairly specific purpose rather than general scaling/availability
improvements. Is there a wiki or something where ideas and links to
software could be collected?

--
Craig Ringer



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