Advanced replication topologies and synchronization models
The advanced replication architecture is designed for a large variety of topologies that all support multitier data redundancy. In a multitier architecture, replicas can also be masters to other replicas The data is known as redundant when the same data exists in multiple databases in the same system. Thus, by nature, multiple and possibly temporarily different versions of the same data item can coexist.
Advanced replication also supports synchronization models where a single replica is synchronized with multiple masters.