Event Sourcing is a software architecture pattern that records changes to an application as a sequence of events rather than just storing the current state. This inversion of the traditional approach allows for all changes to be tracked, provides a full audit log, and simplifies recovery and analysis of past data states. Introduced around 2005, it has gained traction for its benefits, including enhanced observability, improved support for microservices, and robust fault tolerance. However, teams must consider potential complexities and understand when it is suitable for their projects.
Event Sourcing acts as the core source of information by saving all changes as events instead of modifying an existing record, thus preserving a full change history.
The primary benefits of Event Sourcing include observability, system decomposition, and enhanced fault tolerance, allowing for easier tracking of changes and data restoration.
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