asterisk users - Feb 2010 - Asterisk cluster in Active/Active mode

Hi,

Right now I have two machines and each one runs Asterisk and Openser. Both
machines have a MySql database where everything is stored and is replicated
using MySql Cluster. I would like to know how to setup an Active/Active Asterisk
system. Right now, Asterisk save changes to the spool files.

Thanks in advanced