Primary-Replica Architecture
Primary-Replica Architecture is a data replication pattern where one primary node handles all write operations and replicates data to one or more replica nodes that serve read operations. This design ensures high availability, fault tolerance, and scalability by distributing read loads across replicas while maintaining data consistency through replication. It is commonly used in database systems, distributed computing, and cloud services to improve performance and reliability.
Developers should learn this architecture when building systems requiring high read throughput, data redundancy, or disaster recovery, such as e-commerce platforms, content delivery networks, or financial applications. It is essential for scenarios where minimizing downtime and ensuring data availability are critical, as replicas can take over if the primary fails, and read-heavy workloads can be offloaded to replicas to reduce primary node load.