Listening to the Heartbeat of Your Database: Understanding Change Data Capture (CDC)

Short summary

Change Data Capture (CDC) is a technique that exposes ordered database changes as events, eliminating inefficient polling. Instead of repeatedly querying for updates, applications subscribe to real-time change streams from a database's transaction log. This enables event-driven architectures, data synchronization across services, search indexing, and analytics pipelines.

• •CDC exposes ordered database changes as events instead of requiring applications to poll
• •Different databases implement CDC differently (MongoDB Change Streams, MySQL Binlog, PostgreSQL Logical Decoding)
• •Key use cases: search index sync, analytics pipelines, cache invalidation, event-driven architecture, data warehouse sync

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