Scale By The Bay 2021 : Itai Yaffe, Yakir Buskilla, Casting the spell: Druid in practice

ai.bythebay.io Nov 2025, Oakland, full-stack AI conference We’ve been using Apache Druid for over 5 years, to provide customers with real-time analytics tools for various use-cases, including in-flight analytics, reporting and building target audiences. The common challenge of these use-cases is counting distinct elements in real-time at scale, and we will show why Druid is a great tool for that. In this talk, we will also share some of the best practices and tips we’ve gathered over the years. We will cover the following topics: * Data modeling * Ingestion * Retention and deletion * Query optimization