Explore the inner workings of reactive data access in this 51-minute conference talk from Spring I/O 2018 in Barcelona. Dive deep into the native reactive support introduced in Spring Framework 5.0 and its ecosystem projects, focusing on how reactive infrastructure differs from traditional approaches and handles I/O. Gain insights into the mechanics of reactive drivers used in Spring Data, including those for relational databases, MongoDB, Redis, Apache Cassandra, and Couchbase. Learn about synchronous and reactive data access, timeouts, specific features of different databases, and the implications of blocking in both imperative and reactive programming models. Understand the role of the event loop in reactive systems and how it contributes to building end-to-end reactive applications.