On Tue, May 03, 2005 at 08:55:15PM +0100, Julian Scarfe wrote:
> 
> But I do think that it's still a legitimate question to ask: given two 
> nodes, one of which used to be the provider, and the other of which used to 
> be a receiver but has become provider by the execution of a failover 
> command, can I tell that has happened by connecting only to the original 
> provider?

If I understand your question correctly, it translates to, "If node A
doesn't know event E has happened, how does node A know E has
happened?"  The answer, of course, is, "It doesn't."  By definition,
it can't always know that it has failed from the point of view of
those outside itself, because the definition of "failure" has to do
with the state of those other cluster members.

To get what you want, you need something that isn't async.  

A
-- 
Andrew Sullivan  | ajs at crankycanuck.ca
Information security isn't a technological problem.  It's an economics
problem.
		--Bruce Schneier