MySQL Change Data Capture: A Definitive Guide

CDC (Change Data Capture) is a technique used for tracking changes in databases, such as insertions, updates, and deletions, in real-time. It can be utilized in various applications like microservices, data warehouses, cache invalidation, and audit logging. Debezium, Kafka Connect with JDBC connector, and Maxwell are popular solutions for implementing CDC with MySQL. Debezium is an open-source platform that monitors the binary log of a MySQL database to detect changes at the row level. Kafka Connect with a JDBC connector actively queries the database at regular intervals to detect changes. Maxwell, another open-source application, reads MySQL binlogs and outputs data changes as JSON. Practical use cases for CDC include microservices, real-time data loading, cache invalidation, and audit logging. Implementing CDC with Debezium involves setting up a MySQL database, creating the relevant table, and registering the Debezium MySQL connector to monitor the binlog of the database.