Master and Multiple Replicas

Aside from the basic two-server master-replica setup we’ve already mentioned, this is the simplest replication topology. In fact, it’s just as simple as the basic setup, because the replicas don’t interact with each other;^[150] they each connect only to the master. Figure 10-4 shows this arrangement.

This configuration is most useful when you have few writes and many reads. You can spread reads across any number of replicas, up to the point where the replicas put too much load on the master or network bandwidth from the master to the replicas becomes a problem. You can set up many replicas at once, or add replicas as you need them, using the same steps we showed earlier in this chapter.