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System AllegroGraph Apache Cassandra
 Version AllegroGraph 6.4.2 [2018-06-18] 3
 Drawbacks NA community support only available
 Name AllegroGraph Apache Cassandra
 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
Open Source Columnar NoSQL Database with excellent performance
 Website www.allegrograph.com,
 Languages Supported Java, Python, Ruby, Perl, C#, Clojure and Common Lisp C C# C++ Java Node.js PHP Python Ruby
 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
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 Graph Database, A triplestore or RDF store Primarily a NoSQL database
 Technical Documentation franz.com/agraph/support/documentation/current/agraph-introduction.html docs.datastax.com
 License Commercial Commercial
 Cloud-based / SaaS No Virtual Machine Images available in AWS Azure and Google Cloud Marketplace. https://bitnami.com/stack/cassandra/cloud/aws
 Implementation Language Common Lisp C,C++
 Operating System Supported Windows, Linux, and Mac OS X Linux OS X Solaris Windows
 Options for Integration / Access API Java, Python, Common Lisp and other APIs CQL (Cassandra Query Language is like SQL) Thrift Protocol
 Consistency Yes Highly Consistent
 Foreign Keys No No
 Streaming Support Yes Yes
 Data Storage Schema Yes Key Value Column Family NoSQL DB
 Analytics Support Yes, AllegroGraph Recognized Among Top 10 Analytics Solution Providers by Pharma Tech Outlook for 2016 One of the core features is to build timeseries apps
 Notable Users -- Samsung Smartthings, ING Vysya , Safeway
 Key Differentiator -- Open Source NoSQL DB. The GoTo DB for Columnar NoSQL databases
 Concurrency -- Yes
 Partitioning -- Yes
 Replication -- Yes - Tunable Master-Slave Replication
 Secondary Indexes -- Yes
 SchemaLess -- Yes
 SQL Query -- No, but CQL is similar to SQL