Saga, CQRS & Event Sourcing Explained — Microservices Patterns | Interview Prep

The three data patterns that dominate FAANG system design interviews: Saga (distributed transactions), CQRS (command/query separation), and Event Sourcing. Explained with clear diagrams and when-to-use-what guidance. Lesson 16 of a 23-part message broker crash course for FAANG interviews. You'll learn: • Saga pattern: choreography vs orchestration • CQRS: separating reads from writes • Event sourcing: rebuilding state from events • How these patterns compose (and when NOT to use them) ⏱️ TIMESTAMPS 0:00 When messaging becomes architecture 0:23 Transactions across microservices 1:11 Saga: choreography 1:54 Saga: orchestration 2:25 Compensation is not rollback 2:53 Event sourcing 4:18 Snapshots 4:51 CQRS explained 5:47 The rebuild superpower ━━━━━━━━━━━━━━━━━━━━━━ 📚 FULL SERIES — Message Brokers & Event-Driven Architecture (23 episodes):    • Kafka & Message Queues Explained | System ...   🔔 Subscribe for system design interview prep:    / @nodeprism   This is the crash course I wish I had before my FAANG system design interviews — Kafka, RabbitMQ, SQS/SNS, queues, streaming, and the patterns that actually come up. ━━━━━━━━━━━━━━━━━━━━━━ #microservices #systemdesign #eventdriven