LuTiao Programming

Jan 19, 2026 · Backend Development

How to Build a High‑Concurrency Flash‑Sale System with Spring Boot, Redis, and Lua

The article analyzes why flash‑sale systems often crash under extreme traffic and presents a step‑by‑step solution using Spring Boot, Redis, and Lua that prevents overselling, pre‑warms stock, applies token‑bucket rate limiting, executes atomic stock deductions, and decouples order creation asynchronously while adding monitoring and safety measures.