System Design Diagrams

System design is the discipline of decomposing complex software requirements into reliable, scalable, and maintainable architectures. This collection of 20 free Mermaid diagrams covers the core patterns every engineer and architect needs — from the basics of Microservice Architecture and Monolith Architecture to advanced distributed-systems primitives like Distributed Locking, Leader Election, and Consensus Algorithm.

Deployment strategies get thorough coverage: compare Blue Green Deployment, Canary Deployment, and Rolling Deployment side by side to understand the trade-offs between speed, risk, and rollback complexity. For zero-risk releases, Zero Downtime Deployment ties these strategies together.

Resilience and availability patterns are well represented too. See how Circuit Breaker Architecture prevents cascade failures, how High Availability System eliminates single points of failure, and how System Failover Architecture routes traffic during an outage. Multi Region Deployment shows how global services maintain uptime across geographic boundaries.

Rounding out the set are architectural paradigms — CQRS Architecture, Event Driven System, Service Mesh Architecture, API Gateway Architecture, and Distributed Cache — all editable live in Graphlet.