Amazon DynamoDB is a fully managed proprietary NoSQLdatabase service that is offered by Amazon.com as part of the Amazon Web Services portfolio. DynamoDB exposes a similar data model and derives its name from Dynamo, but has a different underlying implementation. Dynamo had a multi-master design requiring the client to resolve version conflicts and DynamoDB use synchronous replication across multiple datacenters  for high durability and availability. DynamoDB was announced by Amazon CTO Werner Vogels on January 18, 2012.
DynamoDB differs from other Amazon services by allowing developers to purchase a service based on throughput, rather than storage. Although the database will not scale automatically, administrators can request more throughput and DynamoDB will spread the data and traffic over a number of servers using solid-state drives, allowing predictable performance. It offers integration with Hadoop via Elastic MapReduce.
In September 2013, Amazon made available a local development version of DynamoDB so developers can test DynamoDB-backed applications locally.