It’s really seldom that you get a chance to see a different thought pattern emerge in database design that literally covers the key advantages of both relational and NoSQL databases and offers a new set of features. Datomic is an aggressive attempt to create a next-generation database that moves us beyond the usual and is built around running in current and future cloud architectures. Let’s start with the some of the features in Datomic. It provides support for ACID transactions, Joins, a sound data model and a logical query language called Datalog. Most of all it breaks with the rigidity of document-based models and relational database models. It also breaks with a model of mutability and a lack of audit data trails. To understand it is worth taking a tour of both it and it’s query language. One surprising aspect that it provides this by using engines like Couchbase, Cassandra,Riak, etc as nothing more than storage engines or services. Let’s start with the tour of Datomic :
By deconstructing the current generation of databases and implementing a modern database focused on breaking with designs from decades ago or some of the issues with the newer NoSQL databases (lack of Joins, lack of ACID, etc). To understand the power of the database you have to explore the power of the datalog query language:
Large, medium and small companies using Datomic. So you may be interested in the “why”. In this presentation – developers of the Brazilian NuBank expose four hidden super-powers of Datomic. In this case, the Clojure programming language is used.
and here is another use-case from Room Key ( joint project of Hilton, Choice, Hyatt, IHT, Marriot, Windom) :
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