We reduced EFS costs by 70% by moving temporary file operations to ephemeral storage. Everything looked perfect — until production started acting strange. Here’s what went wrong, why it happened, and how we built a proper decoupled architecture following AWS Well-Architected principles.
Most AWS cost optimization advice focuses on resizing infrastructure. But in this real production case, scaling wasn’t the problem — logic was. Here’s how understanding versioned Redis keys reduced our AWS bill by 50% without changing traffic or load.
When building production-grade enterprise solutions on AWS, we try to follow all the best practices. But what happens when CDK itself creates unexpected issues? A deep dive into a real-world problem with CloudFront caching and CDK configuration.