Flink CDC is an interesting part of Apache Flink that I’ve been meaning to take a proper look at for some time now. Originally created by Ververica in 2021 and called “CDC Connectors for Apache Flink”, it was donated to live under the Apache Flink project in April 2024.

Whether it’s Understanding CDC or CDC Explained or even Five things about CDC; number four will shock you!, the internet is awash with articles about Change Data Capture (CDC) . CDC is the process of incrementally extracting data change events as they occur within a database. In this post I’d like to take a step back from these and look at the reasons why you might even want to consider CDC in the first place. From here we’ll then build on the requirements we identify to come up with a proposed solution.