Understanding Replication Topologies
The topology for data synchronization determines which replicas synchronize with each other. The topology is essentially a blueprint for how the changes are merged between the members of the replica set. Different topologies are used for different situations, and the topology that you choose is determined by your business needs and your organization's design. The synchronization topologies are star, ring, fully connected, linear, and hybrid. (See Figure 17.2.)
Figure 17.2. Examples of replication topologies.
Star Topology
With the star topology, a single hub periodically synchronizes with the rest of the replicas. ...
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