PostgreSQL Replication
PostgreSQL Replication is a feature that allows data from one PostgreSQL database server (the primary) to be copied to one or more other servers (replicas) to ensure high availability, load balancing, and data redundancy. It supports various replication methods, including streaming replication for real-time data transfer and logical replication for selective data replication. This capability is essential for building scalable and fault-tolerant database systems.
Developers should learn PostgreSQL Replication when building applications that require high availability, disaster recovery, or read scalability, such as e-commerce platforms, financial systems, or data-intensive web services. It is used to set up standby servers for failover, distribute read queries across replicas to reduce load on the primary server, and synchronize data across geographically distributed data centers. Mastering this skill is crucial for maintaining robust database infrastructure in production environments.