Amazon provides DynamoDB in multiple AWS regions across the globe. All of these regions are independent and physically isolated from one another. If you create a DynamoDB employee table in the us-east-1 region and similarly create another employee table in the us-west-2 region, these tables are two separate and isolated tables. An AWS region consists of multiple AZs. Each of the AZs are isolated from failures in any of the AZs in a region. Amazon provides an economical and low-latency network connection between all the AZs in a region.
Whenever you write data to a DynamoDB table, AWS replicates this data across multiple AZs to provide high availability. After writing data to a DynamoDB table, you get an HTTP 200 response; HTTP 200 (OK) indicates that the data has safely updated to all the replicated copies stored in different AZs. AWS provides two types...