Automatically decompress files in Amazon S3 using AWS Step Functions

This article presents a serverless solution using AWS Step Functions to automatically decompress files in Amazon S3 at scale.

• Intelligently routes files under 1 GB to Lambda, larger files to EC2 instances
• Supports zip, gzip, tar, tar.gz, tar.bz2, and tar.xz compression formats
• Processes files in parallel without throttling or bandwidth constraints
• Includes automatic error handling with exponential backoff retry logic
• Optimizes costs using Spot instances for EC2 and automatic resource cleanup
• Maintains security through VPC isolation and data encryption in transit/at rest
• Provides complete CloudFormation templates for easy deployment and configuration

This solution eliminates manual decompression complexity, enabling organizations to process thousands of compressed files daily efficiently without managing infrastructure.