Article · Wikipedia archive · Last revised Jun 15, 2026

Datomic

Datomic is a distributed database and implementation of Datalog. It has ACID transactions, joins, and a logical query language, Datalog. A distinguishing feature of Datomic is that time is a basic feature of data entities.

Last revised
Jun 15, 2026
Read time
≈ 1 min
Length
178 w
Citations
10
Source
Wikipedia ↗
Datomic
Original authorsRich Hickey, Stuart Halloway, Justin Gehtland
DeveloperCognitect
Initial release2012 (2012)
Stable release
1.0.7387 / June 27, 2025 (2025-06-27)
Written inClojure1
TypeDatalog, NoSQL
LicenseApache 2.0 (binaries only)2
Websitedatomic.com

Datomic is a distributed database and implementation of Datalog.34 It has ACID transactions, joins, and a logical query language, Datalog.56 A distinguishing feature of Datomic is that time is a basic feature of data entities.7

Architecture

It has been designed for first-class use with JVM languages such as Java and Clojure.8

In its reference architecture, Datomic uses peers9 and transactors10 which run on the JVM.

References

References

  1. "Introduction | Datomic". docs.datomic.com. Retrieved 2024-10-03.
  2. "Datomic - Datomic is Free". blog.datomic.com. Retrieved 2024-10-03.
  3. Hickey, Rich (2013-02-01). "The Datomic Information Model". Retrieved 2013-02-04.
  4. Halloway, Stuart. "Datomic: A New Database". The Strange Loop. Archived from the original on 2013-03-09. Retrieved 2013-02-04.
  5. "Datomic Rationale". Cognitect. Archived from the original on 2013-07-08. Retrieved 2013-02-04.
  6. Hunger, Michael. "Rich Hickey's Datomic embraces Cloud, intelligent Applications and Consistency". Retrieved 2013-02-04.
  7. Kiel, Alexander (2013-02-05). "Datomic - A Functional Database" (PDF). Leipzig University.
  8. Hickey, Rich (2012-06-06). "The Design of Datomic".
  9. "Overview of Peers in Datomic".
  10. "Datomic Transactor". Retrieved 2021-04-08.