Elixir GenStage Stream Design: Building Robust Concurrent Pipelines
Johnson, Robert U.
Synopsis "Elixir GenStage Stream Design: Building Robust Concurrent Pipelines"
**Elixir GenStage Stream Design: Building Robust Concurrent Pipelines** is a practical, in-depth guide to designing high-performance data pipelines with GenStage in Elixir. It introduces the core ideas behind the framework—producers, consumers, demand-driven flow, and OTP supervision—while explaining how Elixir’s actor model enables safe, scalable concurrency. Readers will learn how to move from foundational concepts to working pipeline architectures through clear examples that show how stages communicate, how backpressure is managed, and how resilient systems are composed. As the book progresses, it explores proven design patterns for building robust concurrent pipelines, including linear flows, fan-out and fan-in topologies, partitioning strategies, and distributed stage coordination. It also covers advanced topics such as buffering, error handling, recovery, performance tuning, and observability, helping readers build systems that remain reliable under load. Practical guidance is provided for integrating GenStage with external services and data sources, along with techniques for maintaining throughput without sacrificing correctness or maintainability. The book also emphasizes production readiness, with attention to testing, monitoring, and operational hardening. Real-world case studies—such as log processing, ETL pipelines, telemetry ingestion, and anomaly detection—illustrate how GenStage can be applied to demanding workloads. Whether you are modernizing legacy systems or building cloud-scale reactive infrastructure from scratch, **Elixir GenStage Stream Design: Building Robust Concurrent Pipelines** offers the knowledge and patterns needed to create maintainable, secure, and efficient streaming applications in Elixir.