Timely replication of data across regions is important to facilitate a seamless user experience when a regional failover occurs. During normal execution, regional replication will occur in near real time. During a regional failure, it should be expected that data would replicate more slowly. We can think of this as protracted eventual consistency. Fortunately, our cloud-native systems are designed to be eventually consistent. This means they are tolerant of stale data, regardless of how long it takes to become consistent. This recipe shows how to create global tables to replicate DynamoDB tables across regions and discusses why we do not replicate event streams.
Implementing regional replication with DynamoDB
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