A2billing message queueing

The concept is I have a Singapore and a London pop. London is the master site. From London I replicate the a2billing database to Singapore site. The asterisk boxes in Singapore read all a2billing configuration data from the Singapore a2billing database i.e. all the rate tables etc. The project is to Configure message queueing for the Singapore a2billing to update the London cluster I think this will involve splitting the read write agi script in a2billing. I will take your lead on how to do this. I know this can be down with mysql master-master replication. I do not want to do it this way