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System AWS DynamoDB Cassandra (Datastax)
 Version released Jan 2012 2.1
 Drawbacks Very few features when compared to other key-value stores Paid Version, License Fees, Support Fees
 Advantages Managed Database Service provided by a leading cloud provider DB Failover capability, Enterprise support available
 Website aws.amazon.com/­dynamodb www.datastax.com
 XML Support no Not Available.Generally not available in NOSQL DB. Well known RDBMS have this feature
 Name Amazon DynamoDB Cassandra (Datastax)
 Languages Supported Java, Node.js, Go, C# .NET, Perl, PHP, Python, Ruby, Haskell and Erlang. C C# C++ Java Node.js PHP Python Ruby
 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 DataStax was built on the open source NoSQL database Apache Cassandra. Cassandra was initially developed internally at Facebook to handle large data sets across multiple servers. It was released as an Apache open source project in 2008
 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 and Azure Marketplace. Available as a Hybrid Cloud SaaS Option - NA
 Implementation Language C++ C,C++
 Operating System Supported Linux , OS X, Windows Linux, OS X,
 Options for Integration / Access API Rest API CQL (Cassandra Query Language is like SQL) Gremlin
 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. Graph DB built natively on top of the core NoSQL Column Store. Graph and NoSQL component share the same core. Enterprise version of Cassandra supports HighAvailability (HA)
 Concurrency Yes Yes
 Partitioning Sharding Yes
 Replication Multi Data Center Replication supported Yes
 Secondary Indexes Yes Yes
 SchemaLess Yes Yes
 SQL Query No No, but CQL is similar to SQL