Discover how the powerful combination of open source Valkey and Amazon ElastiCache is transforming distributed caching in this 52-minute conference talk from AWS re:Invent 2025. Explore recent innovations including probabilistic data structures like bloom filters, a memory-efficient dictionary that reduces memory usage by up to 40%, and a multi-threaded architecture enabling instantaneous scaling by up to 230%. Learn about the infrastructure that allows ElastiCache to seamlessly patch hundreds of thousands of customers while maintaining high availability, even for extreme workloads like Prime Day's trillion requests per minute. Gain insights into how these advancements are making caching solutions better, faster, and more cost-effective for modern distributed systems.