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System Cassandra (Datastax) AWS DynamoDB
 Version 2.1 released Jan 2012
 Drawbacks Paid Version, License Fees, Support Fees Very few features when compared to other key-value stores
 Advantages DB Failover capability, Enterprise support available Managed Database Service provided by a leading cloud provider
 Website www.datastax.com aws.amazon.com/­dynamodb
 XML Support Not Available.Generally not available in NOSQL DB. Well known RDBMS have this feature no
 Name Cassandra (Datastax) Amazon DynamoDB
 Languages Supported C C# C++ Java Node.js PHP Python Ruby Java, Node.js, Go, C# .NET, Perl, PHP, Python, Ruby, Haskell and Erlang.
 JSON Support yes yes
 Brief description 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 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
 Database Model Primarily a NoSQL database Key Value Model
 Technical Documentation docs.datastax.com aws.amazon.com/­documentation/­dynamodb
 License Commercial commercial on aws cloud.
 Cloud-based / SaaS Virtual Machine Images available in AWS and Azure Marketplace. Available as a Hybrid Cloud SaaS Option - NA Yes but you can download dynamod db locally as well. Local installation does not have vendor support
 Implementation Language C,C++ C++
 Operating System Supported Linux, OS X, Linux , OS X, Windows
 Options for Integration / Access API CQL (Cassandra Query Language is like SQL) Gremlin Rest API
 Consistency Highly Consistent Immediate consistency
 Foreign Keys No No
 Streaming Support Yes No
 Analytics Support One of the core features is to build timeseries apps NA
 Data Storage Schema Key Value Column Family NoSQL DB Key Value Model
 Notable Users Samsung Smartthings, ING Vysya , Safeway As per Amazon the solution has been deployed by around 100,000 customers
 Key Differentiator 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) Amazon allows developers to purchase a service based on throughput, rather than storage.
 Concurrency Yes Yes
 Partitioning Yes Sharding
 Replication Yes Multi Data Center Replication supported
 Secondary Indexes Yes Yes
 SchemaLess Yes Yes
 SQL Query No, but CQL is similar to SQL No