System Design · Senior · Question 72 of 75

What is Change Data Capture (CDC) used for?

✓Correct answer: Streaming database changes (from the write-ahead log) to other systems like search indexes, caches or analytics
2Capturing screenshots of data
3Validating form changes

Explanation

Reading the log avoids dual writes from application code and keeps derived stores eventually consistent.

Further reading

Wikipedia: Change data capture ↗

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