设计完善的AWS系统通常遵循既定的模式——三层Web架构、微服务、事件驱动、无服务器和其他模式——这些模式将AWS服务组合在一起,以解决可扩展性、解耦和弹性等常见需求。
Three-tier web architecture (classic)
The classic scalable web app:
PRESENTATION → CloudFront (CDN) + S3 (static frontend) or ALB → web tier
APPLICATION → EC2/containers (auto-scaled, multi-AZ) behind a load balancer
DATA → RDS (Multi-AZ) / DynamoDB; ElastiCache for caching
→ Each tier scales independently; multi-AZ for HA; the foundational web pattern.
Microservices
Decompose into independent services (each owning its data):
→ containers (ECS/EKS) or Lambda per service; API Gateway / service mesh
→ communicate via APIs and async messaging (SQS/SNS/EventBridge)
→ independent scaling, deployment, and teams
→ Flexibility and scalability at the cost of distributed-system complexity.
