OrientDB

OrientDB

Developer(s)	Luca Garulli
Initial release	2010 (2010)
Written in	Java
Operating system	Cross-platform
Type	Graph database
License	Apache 2 License
Website	www.orientechnologies.com

OrientDB is an open source NoSQL database management system written in Java.^[1] Even if it is a document-based database, the relationships are managed as in graph databases with direct connections between records. It supports schema-less, schema-full and schema-mixed modes. It has a strong security profiling system based on users and roles and supports SQL as a query languages. Thanks to the SQL layer OrientDB is straightforward to use. This results in ease-of-use for people skilled in the relational database model.

OrientDB uses a new indexing algorithm called MVRB-Tree, derived from the Red-Black Tree and from the B+Tree; this reportedly has benefits of having both fast insertions and ultra fast lookups.

Features

• Transactional: supports ACID Transactions. On crash it recovers pending documents
• GraphDB: native management of graphs. 100% compliant with TinkerPop Blueprints standard for Graph database
• SQL: supports SQL language with extensions to handle relationships without SQL join, manage trees and graphs of connected documents
• Web ready: supports natively HTTP, RESTful protocol and JSON without use 3rd party libraries and components
• Run everywhere: the engine is 100% pure Java: runs on Linux, Windows and any system that supports Java technology
• Embeddable: local mode to use the database bypassing the Server. Perfect for scenarios where the database is embedded
• Apache 2 License: always free for any usage. No fees or royalties required to use it
• Light: has a footprint of about 1Mb for the full server. No dependencies from other software. No other libraries needed
• Commercial support available

References

1. ^ OrientDB - Pure Java NoSQL Datastore, Java Lobby

External links

• Official OrientDB website
• Code base on Google Code
• Public technical group