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Explore the inner workings of PubSub and its crucial role in building scalable, fault-tolerant, and real-time systems in this 23-minute conference talk from Code BEAM America 2025. Begin with an introduction to the Publisher/Subscriber pattern, highlighting how it decouples services and facilitates efficient message broadcasting in distributed architectures. Delve into Phoenix.PubSub, discovering how it powers real-time features in LiveView and handles clustering across multiple nodes. Experience two hands-on examples demonstrating PubSub in action: a GenServer broadcasting state across nodes using libCluster, and real-time updates between LiveComponents and LiveView. Master PubSub concepts and learn to build resilient, scalable applications, making this presentation perfect for Elixir developers seeking to enhance their understanding of distributed system communication patterns.
