Turning Databases Into Immutable Logs with Apache Samza

Commenters repeatedly cite it as the talk that reframed how they think about caching, derived data and event sourcing.

Martin Kleppmann argues that databases are global shared mutable state and proposes treating them as an ever-growing log of immutable facts. Derived data such as caches, indexes and views is then built by stream processors like Apache Samza. The talk draws on Kafka and LinkedIn's experience with commit logs.