Trigger-Based Replication
Trigger-based replication is a database replication technique that uses database triggers to capture changes (inserts, updates, deletes) in a source database and propagate them to one or more target databases. It works by automatically executing custom code (triggers) when data modifications occur, logging these changes, and then applying them to replicas, often in near real-time. This method is commonly implemented in relational databases like MySQL, PostgreSQL, or Oracle to maintain data consistency across distributed systems.
Developers should use trigger-based replication when they need a flexible, application-level approach to synchronize data between databases, especially in scenarios requiring custom logic or transformation during replication. It is ideal for environments where built-in replication features are insufficient, such as when replicating specific tables, filtering data, or integrating with heterogeneous systems. However, it can introduce performance overhead and complexity compared to native replication methods, so it's best suited for moderate-scale deployments with specific requirements.