Debezium
Debezium is an open-source distributed platform for change data capture (CDC) that monitors databases for row-level changes and streams them as events to Apache Kafka. It works by reading database transaction logs (e.g., MySQL binlog, PostgreSQL WAL) in real-time, ensuring low latency and minimal impact on source databases. This enables applications to react immediately to database changes, supporting use cases like data synchronization, event-driven architectures, and real-time analytics.
Developers should use Debezium when building systems that require real-time data integration, such as microservices architectures where services need to stay synchronized with database changes without direct coupling. It's particularly valuable for scenarios like maintaining read replicas, populating search indexes (e.g., Elasticsearch), or feeding data lakes, as it provides a reliable, scalable way to capture and propagate database changes as events. Compared to polling-based approaches, Debezium reduces database load and offers exactly-once semantics in many configurations.