CQRS (Command Query Responsibility Segregation)

CQRS is a pattern that separates read and update operations for a data store. Instead of using a single model for both, you have a Command Model (Write) and a Query Model (Read).

When to Use

• Asymmetric Read/Write Workloads: Systems where reads outnumber writes by 100:1 or 1000:1 and require independent horizontal scaling.
• Complex Reporting & Search Views: Aggregating data across multiple aggregates into denormalized read stores (Elasticsearch, Read Replicas).
• Collaboration & High Concurrency: Optimizing write performance and transactional consistency while delivering instant query responses.
• Pairing with Event Sourcing: When state changes are captured as events and read models are asynchronously projected from event streams.

Quick Start