CQRS Pitfalls and Patterns

Explore the pitfalls and patterns of Command/Query Responsibility Segregation (CQRS) in this comprehensive conference talk from NDC Oslo 2023. Discover why CQRS can sometimes increase system complexity without delivering performance benefits. Learn where to apply CQRS effectively in projects and, more crucially, where to avoid its implementation. Delve into topics such as command query separation, domain models, architecture, standard and simple CQRS, private vs public data, vertical slice architecture, race conditions, optimistic concurrency, connection pools, and advanced composition. Gain insights on best practices and solutions to common CQRS problems to optimize your development approach.

Introduction
CQRS Pitfalls
Best Practices
Command Query Separation
Domain Models
Architecture
Standard CQRS
Simple CQRS
Private vs Public Data
Problems with CQRS
Vertical Slice Architecture
Race Conditions
Optimistic concurrency
Connection pool
Nonblocking
Advanced composition