Hi,
I just start to use the Openser as the presence server.
I tested with the eyebeam. The server saved the presentity information to the MySQL server.
It worked well. 
I have questions.
I would like to setup two presence servers. One is active, and the other is stand-bye.
If the active is down,  the client  sends a message to the stand-bye.
How does the presence server  know that it is active or stand-bye? 
How do I set it up?
How do I replicate the database between servers?
If the active is down, how do I make it up running again?
 
Thanks.
 
 
Jeon