5️⃣ CQRS + Event Sourcing
💡 Best for: High-performance applications with complex read/write separation.
✅ Key Concepts:

• CQRS (Command Query Responsibility Segregation): Separate read and write models for better scalability.
• Event Sourcing: Stores all changes as events, making it easy to rebuild state/history.

📦 Example:
scss
CopyEdit
Command Service (Write)    → PostgreSQL (for transactions)
Query Service (Read)       → Elasticsearch (for fast queries)
Event Store                → Kafka (for event persistence)
🔹 Why use it?

• Scales efficiently for read-heavy applications.
• Enables audit logs (since every change is stored as an event).

🚨 Limitations:

• Complexity (requires expertise in event-driven systems).
• Storage overhead (event store grows over time).