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System ElasticSearch AllegroGraph
 Name ElasticSearch AllegroGraph
 Version Version 6.4.1 (released in September 2018) AllegroGraph 6.4.2 [2018-06-18]
 Drawbacks Elasticsearch AMI not available NA
 Advantages Large number of drivers present for integration -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 www.elastic.co/­products/­elasticsearch www.allegrograph.com,
www.franz.com/agraph/allegrograph
 Languages Supported .Net Groovy Java JavaScript Perl PHP Python Ruby Java, Python, Ruby, Perl, C#, Clojure and Common Lisp
 JSON Support yes yes
 XML Support no yes
 Brief description Elasticsearch is a search engine based on Lucene. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents. -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 NoSQL Model Graph Database, A triplestore or RDF store
 Technical Documentation www.elastic.co/­guide/­en/­elasticsearch/­reference/­current/­index.html franz.com/agraph/support/documentation/current/agraph-introduction.html
 License Open Source. Commercial version with HA available with redislabs.com Commercial
 Cloud-based / SaaS ElasticSearch Cloud Cluster available from ElasticSearch No
 Implementation Language C,C++ Common Lisp
 Operating System Supported Linux OS X Solaris Windows Windows, Linux, and Mac OS X
 Options for Integration / Access API Proprietary protocol using JSON Java, Python, Common Lisp and other APIs
 Consistency Highly Consistent Yes
 Foreign Keys No No
 Streaming Support Yes Yes
 Data Storage Schema Inverted Index Yes
 Analytics Support NA Yes, AllegroGraph Recognized Among Top 10 Analytics Solution Providers by Pharma Tech Outlook for 2016
 Notable Users -- --
 Key Differentiator No known Enterprise Competitor apart from Amazaon Cloud Search --
 Concurrency Yes --
 Partitioning Yes --
 Replication Yes --
 Secondary Indexes Yes --
 SchemaLess Yes --
 SQL Query No --