Change Data Capture (CDC) is a technique to capture data changes, such as inserts, updates, and deletes, as they occur. CDC is the foundation for data replication from operational databases to warehouses, search indexes, and AI systems. Several methods of capturing changes can be considered "CDC" though log-based CDC is generally the most accurate and effective methodology.
More Core Concept terms
Delivery Semantics
Delivery semantics describes the guarantee a pipeline makes about how many times each change event reaches the destination.
Exactly-once Delivery
Exactly-once delivery is the guarantee that each record from a source reaches the destination precisely one time, with no duplicates and no dropped events.
Right-time Data
Right-time data means delivering data at the cadence each use case actually requires: sub-second, near-real-time, and scheduled batch.
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