$CQRS (Command Query Responsibility Segregation)

CQRS separates the model used to change state from the model used to answer queries.

Aug 20, 2026

Pros

• We can design models that handle business rules, while separate read models are optimised for queries.
• This approach lets command and query workloads scale independently when needed.
• It supports creating different projections for various users or use cases.

Drawbacks

• You will need to manage duplicate models, extra mapping, and more components.
• Asynchronous projections can cause delays and need clear handling for stale reads.
• Using CQRS for basic CRUD systems adds extra complexity without much advantage.