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System AllegroGraph AWS DynamoDB
 Name AllegroGraph Amazon DynamoDB
 Version AllegroGraph 6.4.2 [2018-06-18] released Jan 2012
 Drawbacks NA Very few features when compared to other key-value stores
 Advantages -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
Managed Database Service provided by a leading cloud provider
 Website www.allegrograph.com,
 Languages Supported Java, Python, Ruby, Perl, C#, Clojure and Common Lisp Java, Node.js, Go, C# .NET, Perl, PHP, Python, Ruby, Haskell and Erlang.
 JSON Support yes yes
 XML Support yes no
 Brief description -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
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 Graph Database, A triplestore or RDF store Key Value Model
 Technical Documentation franz.com/agraph/support/documentation/current/agraph-introduction.html aws.amazon.com/­documentation/­dynamodb
 License Commercial commercial on aws cloud.
 Cloud-based / SaaS No Yes but you can download dynamod db locally as well. Local installation does not have vendor support
 Implementation Language Common Lisp C++
 Operating System Supported Windows, Linux, and Mac OS X Linux , OS X, Windows
 Options for Integration / Access API Java, Python, Common Lisp and other APIs Rest API
 Consistency Yes Immediate consistency
 Foreign Keys No No
 Streaming Support Yes No
 Data Storage Schema Yes Key Value Model
 Analytics Support Yes, AllegroGraph Recognized Among Top 10 Analytics Solution Providers by Pharma Tech Outlook for 2016 NA
 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