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Resilient Architectures

Design fault-tolerant and highly available systems.

High Availability Principles​

Multi-AZ Deployments​

  • Deploy across multiple Availability Zones
  • Automatic failover capabilities
  • RDS Multi-AZ for database resilience

Load Balancing​

  • Application Load Balancer (ALB)
  • Network Load Balancer (NLB)
  • Distribute traffic across healthy instances

Fault Tolerance Strategies​

Auto Scaling​

  • Automatically adjust capacity
  • Health checks and replacement
  • Scale based on demand

Backup and Recovery​

  • Regular automated backups
  • Cross-region replication
  • Point-in-time recovery

Design Patterns​

Circuit Breaker Pattern​

  • Prevent cascading failures
  • Graceful degradation
  • Monitoring and alerting

Bulkhead Pattern​

  • Isolate critical resources
  • Separate failure domains
  • Resource partitioning