Introduction to Netflix Hollow

Netflix Hollow is a low-latency Java framework for distributing data from a source to multiple targets using a producer-consumer model. The producer fetches data from external systems and publishes snapshots to file systems or object storage, while consumers read and process these snapshots. The framework efficiently manages memory by offloading large datasets to external storage, addressing Java heap space issues. Implementation involves defining entity classes with primary keys, setting up publishers and announcers for producers, generating consumer APIs using HollowAPIGenerator, and configuring announcement watchers and retrievers for consumers. The library handles snapshot versioning, updates, and notifications automatically.