ArangoDB is a native multi-model database system developed by triAGENS GmbH. The database system supports three important data models (key/value, documents, graphs) with one database core and a unified query language AQL (ArangoDB Query Language). The query language is declarative and allows the combination of different data access patterns in a single query. ArangoDB is a NoSQL database system but AQL is similar in many ways to SQL.
3.2.4 / September 26, 2017
|Type||Graph database, Document-oriented database, Key/Value database, Multi-model database|
|License||Apache License 2.0|
ArangoDB has been referred to as a universal database  but its creators refer to it as a "native multi-model" database to indicate that it was designed specifically to allow key/value, document, and graph data to be stored together and queried with a common language.
ArangoDB provides scalable, highly efficient queries when working with graph data. The database uses JSON as a default storage format, but internally it uses ArangoDB's VelocyPack – a fast and compact binary format for serialization and storage. ArangoDB can natively store a nested JSON object as a data entry inside a collection. Therefore, there is no need to disassemble the resulting JSON objects. Thus, the stored data would simply inherit the tree structure of the XML data. 
ArangoDB works in a distributed cluster unlike some other existing graph databases and it is the first DBMS being certified for the Datacenter Operating System (DC/OS). DC/OS allows the user to deploy ArangoDB on most existing ecosystems: Amazon Web Services (AWS), Google Compute Engine and Microsoft Azure. Moreover, it provides single-click deployment for the user's cluster.
Started in 2011, the database was originally released under the name AvocadoDB, but changed to ArangoDB in 2012.
- Leonard, Anghel (2013). Pro Hibernate and MongoDB. Apress. p. 384. ISBN 9781430257943 – via Google Play.
Multimodel databases (..., ArangoDB and more)
- Vaish, Gaurav (2013). Getting Started with Nosql. Packt Publishing Ltd. p. 142. ISBN 9781849694995 – via Google Play.
ArangoDB: Universal database with support for document store, key-value and graph models.
- Weinberger, Claudius. "Native multi-model can compete with pure document and graph databases". ArangoDB.com. Retrieved 20 August 2015.
- Celler, Frank. "Hacker News comment". Hacker News. Retrieved 20 August 2015.
- Collins, Michael (2014). Network Security Through Data Analysis: Building Situational Awareness. O'Reilly Media, Inc. p. 348. ISBN 9781449357887 – via Google Play.
- Wiese, Lena (2015). Advanced Data Management: For SQL, NoSQL, Cloud and Distributed Databases. Walter de Gruyter GmbH & Co KG. p. 374. ISBN 9783110433074 – via Google Play.
...and several databases use JSON as their primary storage format – in particular, several open source document databases like ArangoDB,...
- Neunhöffer, Max (2016). "A fast and compact format for serialization and storage". www.github.com. ArangoDB GmbH. Retrieved December 28, 2016.
- Agoub, Amgad; Kunde, Felix; Kada, Martin (2016). "Potential of Graph Databases in Representing and Enriching Standardized Geodata". Publikationen der DGPF. 25: 10 – via ResearchGate.
- Neunhöffer, Max (November 30, 2015). "Scaling ArangoDB to gigabytes per second on Mesosphere's DCOS". www.mesosphere.com. Mesosphere. Retrieved December 28, 2016.
- Streichardt, Andreas (May 2016). "Running ArangoDB on DC/OS". www.dcos.io. DC/OS. Retrieved December 28, 2016.
- Weinberger, Claudius (June 2016). "ArangoDB Foxx". www.arangodb.com. ArangoDB GmbH. Retrieved December 28, 2016.
- Plum, Alan (February 17, 2016). "Using GraphQL with NoSQL database ArangoDB". www.arangodb.com. ArangoDB GmbH. Retrieved December 28, 2016.
- Lübbert, Dorthe. ""AvocadoDB" becomes "ArangoDB"". ArangoDB.com. Retrieved 20 August 2015.