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Everything about OrientDB

NoSQL database management system

OrientDB is an open source NoSQL database management system written in Java. It is a Multi-model database, supporting graph, document and object models, 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, that serves as a container of RIDs, which allows fast traversal 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, as of January 2024. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: OrientDBA 5-minute orientation
  2. Pick up a classic book: Getting Started with OrientDBThe most-reprinted book on the subject
  3. Read the landmark paper: Visualizing Class Diagram using Orientdb NOSQL Data – StoreCited 2 times
  4. Go sideways: Multi-model databaseA closely related topic
  5. Go sideways: NoSQLA closely related topic

đź“– Definitions

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🗂️ The subject at a glance

  1. Engine
  2. Editions & licenses
  3. Applications
  4. History

🏆 Landmark papers (most cited)

đź“š Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

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