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System AWS DynamoDB Apache Cassandra
 Version released Jan 2012 3
 Drawbacks Very few features when compared to other key-value stores community support only available
 Name Amazon DynamoDB Apache Cassandra
 Advantages Managed Database Service provided by a leading cloud provider Open Source Columnar NoSQL Database with excellent performance
 Languages Supported Java, Node.js, Go, C# .NET, Perl, PHP, Python, Ruby, Haskell and Erlang. C C# C++ Java Node.js PHP Python Ruby
 Website aws.amazon.com/­dynamodb www.datastax.com/products/datastax-enterprise
 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 MongoDB is a free and open-source cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with schemata. MongoDB is developed by MongoDB Inc.
 Database Model Key Value Model Primarily a NoSQL database
 Technical Documentation aws.amazon.com/­documentation/­dynamodb docs.datastax.com
 License commercial on aws cloud. Commercial
 Cloud-based / SaaS Yes but you can download dynamod db locally as well. Local installation does not have vendor support Virtual Machine Images available in AWS Azure and Google Cloud Marketplace. https://bitnami.com/stack/cassandra/cloud/aws
 Implementation Language C++ C,C++
 Operating System Supported Linux , OS X, Windows Linux OS X Solaris Windows
 Options for Integration / Access API Rest API CQL (Cassandra Query Language is like SQL) Thrift Protocol
 Consistency Immediate consistency Highly Consistent
 Foreign Keys No No
 Streaming Support No Yes
 Analytics Support NA One of the core features is to build timeseries apps
 Data Storage Schema Key Value Model Key Value Column Family NoSQL DB
 Notable Users As per Amazon the solution has been deployed by around 100,000 customers Samsung Smartthings, ING Vysya , Safeway
 Key Differentiator Amazon allows developers to purchase a service based on throughput, rather than storage. Open Source NoSQL DB. The GoTo DB for Columnar NoSQL databases
 Concurrency Yes Yes
 Partitioning Sharding Yes
 Replication Multi Data Center Replication supported Yes - Tunable Master-Slave Replication
 Secondary Indexes Yes Yes
 SchemaLess Yes Yes
 SQL Query No No, but CQL is similar to SQL