CQRS
CQRS (Command Query Responsibility Segregation) is an architectural pattern that separates the read and write operations of a data model into distinct models. The write side (commands) handles data modifications and business logic, while the read side (queries) is optimized for data retrieval and presentation. This separation allows for independent scaling, performance optimization, and flexibility in handling complex domain logic.
Developers should use CQRS in systems with high-performance requirements, complex business logic, or where read and write workloads differ significantly, such as in event-sourced applications, microservices, or high-traffic web platforms. It is particularly beneficial when you need to optimize queries independently from commands, handle eventual consistency, or implement domain-driven design (DDD) effectively.