Warda Bibi lays out the basics of high availability and disaster recovery in PostgreSQL:
System outages, hardware failures, or accidental data loss can strike without warning. What determines whether operations resume smoothly or grind to a halt is the strength of the disaster recovery setup. PostgreSQL is built with powerful features that make reliable recovery possible.
This post takes a closer look at how these components work together behind the scenes to protect data integrity, enable consistent restores, and ensure your database can recover from any failure scenario.
This is mostly an architecture-level view, but then again, a lot of HA/DR is about making good architectural decisions.