 | This article needs additional citations for verification. (July 2015) |
 |
 | |
| Developer(s) | OrientDB Ltd |
|---|---|
| Initial release | 2010 |
| Stable release | 3.2.29
/ March 6, 2024[1] |
| Repository | |
| Written in | Java |
| Platform | Java SE |
| Type | Document-oriented database, Graph database, Multi-model database |
| License | Apache 2 License |
| Website | orientdb |
OrientDB is an open source NoSQL database management system written in Java. It is a Multi-model database, supporting graph, document and object models,[2] 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 querying with Gremlin along with SQL extended for graph traversal. OrientDB uses several indexing mechanisms based on B-tree and Extendible hashing, the last one is known as "hash index". Each record has Surrogate key which indicates the position of the record on disk. Links between records (edges) are stored either as the record's position stored directly inside of the referrer or as B-tree of record positions (so-called record IDs or RIDs), that serves as a container of RIDs, which allows fast traversal (with O(1) complexity) of one-to-many relationships and fast addition/removal of new links. OrientDB is the 6th most popular graph database according to the DB-Engines graph database ranking,[3] as of January 2024.
The development of OrientDB relies on an open-source community. The project uses GitHub[4] to manage the sources, contributors and versioning.
- ^ "OrientDB 3.2 Release Notes". GitHub. Retrieved 6 March 2024.
- ^ "Multi-Model Database - OrientDB Manual". Archived from the original on 2015-05-03. Retrieved 2015-05-31.
- ^ "DB-Engines Ranking - popularity ranking of graph DBMS".
- ^ "orientechnologies/orientdb". GitHub. 30 May 2020.