DynamoDB Multi-Region and Resilience
Explore how DynamoDB global tables support multi-region writes, consistency modes, and traffic routing to deliver resilient, low-latency applications. Understand replica planning, conflict resolution, and operational best practices like failover testing to design reliable multi-active database architectures.
Once change-driven workflows like Streams and TTL-based expiration are running inside a single region, the natural next question is what happens when your users, compliance requirements, or disaster-recovery goals span multiple regions. A single-region DynamoDB table, no matter how well designed, cannot deliver low-latency reads to users on another continent or survive a full regional outage without external intervention. DynamoDB global tables solve this by turning a single table into a collection of replica tables distributed across chosen AWS Regions, each capable of accepting both reads and writes. This makes global tables genuinely multi-active rather than a traditional primary-secondary replication model.
The current production version is Global Tables version 2019.11.21, and this is the only version learners should study. Legacy global table documentation describes a different operational model with manual capacity management and different replication mechanics, so references to the older version should be treated as outdated.
Attention: There is no single global DynamoDB endpoint. Every SDK call, every connection string, and every retry path must reference a specific regional endpoint such as dynamodb.us-east-1.amazonaws.com. Assuming a global endpoint exists is one of the most common misconceptions on exams and in production designs.Global tables expose two consistency modes that fundamentally shape how replication, latency, availability, and conflict handling behave. The default mode is