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A few weeks ago, we shipped cascading replication for PostgreSQL, MySQL and Redis on Cloud 66. Customers can now build replication chains: a primary streaming to a middle replica, which in turn streams to leaves. It reduces load on the primary, supports geographic distribution, and stops you from melting your network when you have a large fan-out of replicas all pulling WAL from the same machine. PostgreSQL has supported cascading replication natively since version 9.1, which shipped over a decade ago.

So far in this deployment series, you’ve: Now we arrive at the layer that quietly determines whether your app thrives… or throws mysterious 2am errors. Step 5 is cloud configuration. This is where your application gets its infrastructure, its environment, and its ability to scale without drama.