What is PostgreSQL Cluster?

A PostgreSQL cluster is a group of PostgreSQL database nodes that work together to provide high availability, scalability, and fault tolerance. It usually includes one primary node for handling write operations and multiple standby nodes for read operations or backup. This setup helps ensure that data remains available even if one node fails.

PostgreSQL clusters are widely used in enterprise environments because they support load balancing, improve performance, and minimize downtime. They are ideal for mission-critical applications that demand continuous uptime and scalability. The combination of flexibility, robustness, and community support makes PostgreSQL clusters a preferred choice in modern enterprise and cloud-native environments.