PostgreSQL Bidirectional Replication (Multi-Master) Logical Replication: The Ultimate 7-Step Multi-Master Setup Guide
PostgreSQL 16 introduces a simpler way to implement bidirectional (active-active) logical replication using the native `origin = none` subscription option. This guide demonstrates how to configure two PostgreSQL 16 nodes to replicate data to each other using built-in publications and subscriptions, eliminating replication loops without relying on third-party extensions. It covers server configuration, replication roles, publications, subscriptions, verification, monitoring, and common pitfalls, providing a practical foundation for building highly available, multi-region PostgreSQL deployments.