Explain event sourcing vs CQRS in large-scale PHP distributed systems and when to use them together.

Event Sourcing stores state as an immutable log of events, while CQRS separates read and write models for scalability and performance.

Event Sourcing and CQRS are often used together in high-scale PHP systems where auditability, scalability, and complex domain logic are required.

Event Sourcing:

CQRS (Command Query Responsibility Segregation):

Combined architecture:

5.…