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System AWS DynamoDB AllegroGraph
 Name Amazon DynamoDB AllegroGraph
 Version released Jan 2012 AllegroGraph 6.4.2 [2018-06-18]
 Drawbacks Very few features when compared to other key-value stores NA
 Advantages Managed Database Service provided by a leading cloud provider -Database being explicitly pre-structured
-Data to self-define the schema at the time of ingest
-Able to connect concepts, properties, and entities across multiple databases and without further coding to extract new, actionable business insights from your data
 Website aws.amazon.com/­dynamodb www.allegrograph.com,
 Languages Supported Java, Node.js, Go, C# .NET, Perl, PHP, Python, Ruby, Haskell and Erlang. Java, Python, Ruby, Perl, C#, Clojure and Common Lisp
 JSON Support yes yes
 XML Support no 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 -Modern, high-performance, persistent graph database
-Uses efficient memory utilization in combination with disk-based storage, enabling it to scale to billions of quads while maintaining superior performance
-Supports SPARQL, RDFS++ and Prolog reasoning from numerous applications
 Database Model Key Value Model Graph Database, A triplestore or RDF store
 Technical Documentation aws.amazon.com/­documentation/­dynamodb franz.com/agraph/support/documentation/current/agraph-introduction.html
 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 No
 Implementation Language C++ Common Lisp
 Operating System Supported Linux , OS X, Windows Windows, Linux, and Mac OS X
 Options for Integration / Access API Rest API Java, Python, Common Lisp and other APIs
 Consistency Immediate consistency Yes
 Foreign Keys No No
 Streaming Support No Yes
 Data Storage Schema Key Value Model Yes
 Analytics Support NA Yes, AllegroGraph Recognized Among Top 10 Analytics Solution Providers by Pharma Tech Outlook for 2016
 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 --