High-throughput enterprise-scale document migration on AWS

This article describes an enterprise-scale document migration system built on AWS that successfully migrated 800 million documents with automated self-healing and integrity validation.

• Event-driven architecture using ECS Fargate for serverless parallel processing with configurable thread pools and batch sizes
• SHA-256 checksum validation for every document ensures 100% integrity coverage against source files
• DynamoDB tracks batch status, document metadata, and complete audit trail for compliance requirements
• Automated failure recovery with separate Failure Processor task retries failed documents without competing with primary throughput
• REST APIs provide real-time progress tracking and per-document status queries for operational visibility
• Single ECS task with 250 Java threads processes 1 million documents in ~4.5 hours; 800 million achievable in ~25 days
• 1,000x throughput improvement over traditional approaches with near-zero operator intervention

The system demonstrates how AWS serverless services enable high-throughput, reliable document migration at enterprise scale with built-in compliance and observability.