Datomic

About Datomic

A fully transactional, cloud-ready, distributed database built on immutable data and designed for value-centric programming. Datomic stores facts with full history, enabling time-travel queries and simplified application architecture.

Key Features

• 1Immutable, append-only database — history of all data changes is preserved
• 2Datalog query language for expressive, declarative data retrieval
• 3Time travel queries retrieve database state at any past point in time
• 4Schema-on-write with entity-attribute-value (EAV) data model
• 5Peer-based architecture: application processes host the query engine

How Python Data Engineers Use Datomic

Python data engineers interact with Datomic via its REST API or the `datomic-py` client. Datomic's immutable history model makes it valuable for audit-trail and compliance pipelines — engineers query the database as-of a specific timestamp to reconstruct what data looked like before a transformation, supporting regulatory reporting requirements.