PostgreSQL 19 RC1 supports multi-writer logical replication across regions using pg_auto_failover

The author builds and tests a multi-region PostgreSQL logical replication system using Postgres 19 release candidate 1 and pg_auto_failover to handle writes across multiple continents. Testing demonstrates that core features such as row filters, loop prevention, failover-safe slots, and sequence synchronization successfully maintain data consistency during failover scenarios, though schema changes and conflict resolution still require additional tooling or manual pauses. Open article →