Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. You can use Amazon DynamoDB to create a database table that can store and retrieve any amount of data, and serve any level of request traffic. Amazon DynamoDB automatically spreads the data and traffic for the table over a sufficient number of servers to handle the request capacity specified by the customer and the amount of data stored, while maintaining consistent and fast performance.

Developer Guide
Provides a conceptual overview of Amazon DynamoDB and includes detailed development instructions for using the various features.
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  API Reference
Describes all the API operations for Amazon DynamoDB in detail. Also provides sample requests, responses, and errors for the supported web services protocols.
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