Event Sourcing
Introduction Event Sourcing has been used in production by some of the world's biggest companies (including Netflix and Walmart) for years, providing them with the platform to rapidly scale, iterate and evolve their systems, and establishing a data model that delivers a strong competitive advantage. In this guide, we discuss what Event Sourcing is, why you'd use it, the range of benefits it provides and we break down the jargon. What is Event Sourcing? Event Sourcing is an architectural design pattern where changes that occur in a domain are immutably stored as events in an append-only log. This provides a business with richer data as each change that occurs within the domain is stored as a sequence of events which can be replayed in the order they occurred. This means you’re able to see more than just the current state of your domain - you can see what lead up to the current state. In addition, as events also contain the context of the change – the ‘what’, ‘when’, ‘why’ a