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Infrastructure that built the web: a short history of event-driven I/O

How I/O multiplexing solved the C10K problem and changed how server applications were built forever.

By Paul Osman

Updated Apr 15, 2026 12:23 PM / Published Apr 14, 2026 1:54 PM 8 min read

Infrastructure that built the web: a short history of event-driven I/O — Image credti: https://unsplash.com/@tvick

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Paul Osman

Staff software engineer with 25+ years in platform engineering and observability. Writing Building the Web (buildingtheweb.dev), a book on web infrastructure evolution from HTTP to Kubernetes. Lives in Brooklyn, NY. Blogs at paulosman.me