In this talk, Yongsheng from Pinterest is going to talk about how to build highly-resilient systems at scale. His talk will cover 5 highly fault-tolerant, battle-tested systems: dynamic service discovery, real-time configuration management, caching, persistent storage, and event processing pipeline. He will also cover failure cases that prompted engineers at Pinterest to build such systems, and how they actually test these systems to make sure that they can gracefully handle those failure scenarios.