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Testing 3-tier Windows app resilience on AWS with Resilience Testing

Microsoft Workloads on AWS Blog



This article discusses resilience testing for three-tier Windows applications on AWS, focusing on two key experiments using AWS Fault Injection Service (FIS):

  • Testing web tier resilience by interrupting an IIS application pool
  • Verifying application behavior during a simulated database fail-over

Key objectives of the resilience testing include:

  • Verifying load balancer's ability to route traffic away from unhealthy instances
  • Ensuring application can handle individual EC2 instance failures
  • Testing application performance during RDS fail-over events

The experiments demonstrate how to use AWS tools to systematically test and improve application reliability, helping teams identify potential vulnerabilities and improve incident response procedures.



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