At StampedeCon 2014, Alex Miller (Cognitect) presented "Datomic – A Modern Database."
Datomic is a distributed database designed to run on next-generation cloud architectures. Datomic stores facts and retractions using a flexible schema, consistent transactions, and a logic-based query language. The focus on facts over time gives you the ability to look at the state of the database at any point in time and traverse your transactional data in many ways.
We’ll take a tour of the Datomic data model, transactions, query language, and architecture to highlight some of the unique attributes of Datomic and why it is an ideal modern database.