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Explore architectural strategies and fault-tolerant patterns to achieve 99.999% availability (five nines) for mission-critical applications using AWS services in this conference talk from AWS re:Invent 2025. Dive deep into multi-Region deployments, active-active failover mechanisms, circuit breakers, bulkheads, chaos testing methodologies, and event-driven architectural designs that eliminate single points of failure. Discover how to leverage Amazon S3, Amazon DynamoDB Global Tables, and AWS Lambda to build resilient systems that can withstand various failure scenarios. Master the concepts of Service Level Agreements (SLAs) and Service Level Objectives (SLOs) while learning to engineer comprehensive observability and automation systems capable of detecting and responding to failures within milliseconds. Gain practical insights through real-world case studies and actionable design guidance specifically tailored for architects and engineers who need to build systems with extreme reliability requirements, where less than five minutes of downtime per year is the acceptable standard.
