The power of Datomic database
summary
Datomic is an immutable, time-aware database that stores data as five-part datoms (entity, attribute, value, tx, op), runs a single ACID transactor with a standby, and persists to back-ends like DynamoDB, Riak or SQL. Queries use a Datalog dialect with recursion, reverse lookup and Java/Clojure DB fns; you can run as-of/since/history filters to time-travel, build validation DB-fns, and create custom filters to hide bad transactions. The architecture yields strong consistency, horizontal read scaling, and easy auditing, with transactions serialized through the transactor.
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chapters (14)
- 0:00Introduction to Datomic
- 0:48Core Datomic concepts
- 2:26Values, identity, and time
- 3:45Datums and data structure
- 5:54Architecture and indexing
- 9:41Querying with Datalog
- 12:02Query examples and patterns
- 14:00Advanced querying techniques
- 16:53Java queries and functions
- 20:58Data validation functions
- 22:27Database filtering and time
- 25:51History and custom filters
- 28:50Advanced features and resources
- 30:47Q&A session
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