PostgreSQL Replication and High Availability for Beginners

In modern application development, keeping your database online and performing well under heavy load is critical. This text-based course guides you through the foundational concepts of database replication, showing you how to distribute read traffic and prevent data loss. You will start with the absolute basics of database clustering, learn core terminology, and understand how data flows from a primary node to secondary replicas. Through clear, step-by-step written explanations, you will learn to configure physical replication, manage connection pooling, and handle failover scenarios. What you'll learn: Understand the core architecture of PostgreSQL replication, including write-ahead logging (WAL); Configure primary and secondary server settings for secure data synchronization; Implement read-scaling strategies to distribute database workloads efficiently; Manage streaming replication and monitor replication lag using system views; Practice manual failover procedures to restore service during primary node outages; Apply modern connection pooling techniques to optimize database resource utilization. This course begins with essential database administration concepts before moving into step-by-step configuration guides and monitoring practices. It is designed specifically for database beginners, system administrators, and backend developers who want to build reliable data infrastructure. No prior database administration experience is required to begin.