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System AWS DynamoDB Azure Cosmos DB
 Name Amazon DynamoDB Azure Cosmos DB
 Version released Jan 2012 NA
 Drawbacks Very few features when compared to other key-value stores 1.Most often compared with MongoDB. Unlike Mongo DB does not support joins 2.Managed Database which can be used only within Azure/Microsoft framework
 Advantages Managed Database Service provided by a leading cloud provider NA
 Languages Supported Java, Node.js, Go, C# .NET, Perl, PHP, Python, Ruby, Haskell and Erlang. .net, C#, Javascript
 Website aws.amazon.com/­dynamodb www.azure.microsoft.com/­services/­cosmos-db
 XML Support no no
 JSON Support yes yes
 Brief description Amazon DynamoDB is a fully managed proprietary NoSQL database service that supports key-value and document data structures[2] and is offered by Amazon.com as part of the Amazon Web Services portfolio 1.Globally distributed, horizontally scalable, multi-model database service 2.Earlier called Azure Document DB. Skype, Xbox uses this DB, Office, Active Directory and MSC (all Microsoft products)
 Database Model Key Value Model Key Value DB
 Technical Documentation aws.amazon.com/­documentation/­dynamodb docs.microsoft.com/­en-us/­azure/­cosmos-db
 License commercial on aws cloud. commercial on azure cloud.
 Cloud-based / SaaS Yes but you can download dynamod db locally as well. Local installation does not have vendor support Azure Cloud based
 Implementation Language C++ NA
 Operating System Supported Linux , OS X, Windows Linux , OS X, Windows
 Options for Integration / Access API Rest API Rest API , MongoDB drivers
 Consistency Immediate consistency Eventual consistency
 Foreign Keys No No
 Streaming Support No No
 Analytics Support NA NA
 Data Storage Schema Key Value Model Multi Model Database
 Notable Users As per Amazon the solution has been deployed by around 100,000 customers --
 Key Differentiator Amazon allows developers to purchase a service based on throughput, rather than storage. --
 Concurrency Yes --
 Partitioning Sharding --
 Replication Multi Data Center Replication supported --
 Secondary Indexes Yes --
 SchemaLess Yes --
 SQL Query No --