AWS Outage Deep Dive: Multi-Cloud Disaster Recovery Strategies for Architects
On October 20, 2025, AWS US-East-1 experienced one of the top three largest outages in history, affecting 6.5 million users and 1000+ companies. This article provides an architect’s perspective on the outage impact, technical root causes, and complete disaster recovery strategies across five levels: Multi-AZ, Multi-Region, Multi-Cloud, and Hybrid Cloud, including cost analysis, real-world cases, and ROI calculations.