How Airbnb Powers Personalization With 1M Events Per Second

Airbnb utilizes its User Signals Platform (USP) to handle real-time personalization effectively, processing over 1 million events per second. USP ingests and processes user actions with sub-second latency, stores both real-time and historical data, and provides a configurable interface for developers. Key features include the use of Flink for event-driven processing, an append-only data model for resilience, and a robust infrastructure with hot standby Task Managers for operational stability.