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Jul 23, 2019 · Backend Development

Designing Ultra‑Fast High‑Concurrency Systems: Principles and a 60k QPS Flash‑Sale Case Study

This article outlines core principles for building high‑concurrency back‑end systems—doing less and doing it cleverly—then demonstrates their application in a real‑world flash‑sale (秒杀) scenario that handled 60,000 queries per second through careful feature selection, data reduction, caching strategies, queue control, and asynchronous processing.