SYSTEM AND METHOD FOR SELECTING THE CORRECT GROUP OF REPLICAS IN A REPLICATED COMPUTER DATABASE SYSTEM

A system, method and computer program product for ensuring that a replicated computer database does not encounter a "split brain" problem by replicating the database and requiring a replica quorum wherein at least (50% +1) of the replicas are accessible and in agreement. When a replica quorum in not obtainable, but 50% of the copies of the data are in agreement, an external source, or "mediator", is called upon to provide a deciding vote (+1) to ensure that the data can be trusted.