Synchronous Replication
Synchronous replication is a data replication technique where changes to a primary database are immediately and simultaneously written to one or more replica databases before the transaction is considered complete. This ensures that all replicas are always in sync with the primary, providing strong data consistency and high availability. It is commonly used in distributed systems, financial applications, and critical infrastructure where data integrity is paramount.
Developers should use synchronous replication in scenarios requiring zero data loss and immediate consistency across nodes, such as in banking systems, healthcare records, or real-time transaction processing. It is essential for applications that cannot tolerate stale data or where failover must be seamless without data discrepancies. However, it may introduce latency due to the wait for replica acknowledgments, so it's best suited for high-availability setups with low-latency networks.