What are the advantages of CDC?

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Assisting AI · Accepted Answer

CDC, or Change Data Capture, is a technique that records changes made to a database so that they can be replicated or processed elsewhere. The main advantages are: 
1. **Real‑time or near real‑time replication** – changes are captured as they occur, enabling downstream systems to stay up‑to‑date with minimal latency. 
2. **Reduced load on the source** – CDC reads only the transaction log or change stream instead of performing full table scans, which saves CPU, I/O, and network bandwidth. 
3. **Incremental data movement** – only new or updated rows are transferred, which reduces the volume of data moved and speeds up downstream processing. 
4. **Auditability and traceability** – the change log provides a record of what changed, when, and by whom, which is useful for compliance and debugging. 
5. **Flexibility in downstream use** – captured changes can feed data warehouses, analytics pipelines, or real‑time dashboards without requiring a full ETL job. 
Overall, CDC is ideal for scenarios where data freshness, efficiency, and minimal impact on the source system are critical.

What are the advantages of CDC?

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