This is part one of a series of blog posts on building a modern event-driven system using Memphis.dev.

Change data capture (CDC) is an architectural pattern that turns databases into sources for event-driven architectures. Frequently, CDC is implemented on top of built-in replication support. Changes to data (e.g., caused by INSERT, UPDATE, and DELETE statements) are recorded as atomic units and appended to a replication log for transmission to replicas. CDC software copies the events from the replica logs to streaming infrastructure for processing by downstream components.