Modernizing and scaling a tightly coupled legacy .Net application on AWS
Migration and Modernization Blog
AWS collaborated with an industrial company to modernize a legacy .NET Framework application using Experience-Based Acceleration (EBA), achieving significant performance and cost improvements.
- Initial performance challenges included 7-8 hour job runtimes and high error rates
- Migration strategy involved re-hosting, then refactoring the application on AWS
- Key architectural changes included:
- Replacing local queues with Amazon SQS global queue
- Using Amazon ECS with capacity provider for dynamic scaling
- Implementing Amazon ECR and EC2 Image Builder to reduce container startup time
- Results: 16.5x performance improvement and 50% cost reduction
- Scaling metrics shifted from CPU utilization to queue depth for proactive scaling
The EBA approach enabled an incremental, hands-on modernization that transformed the legacy application's performance and cost-effectiveness.
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