Senior Tony

Jun 3, 2025 · Backend Development

How to Build a High‑Performance Short URL Service: Redirects, Generation Strategies, and Scaling

This article explains the core functions of a short‑URL system, compares permanent (301) and temporary (302) redirects, details four generation methods—including hash, auto‑increment, random strings, and pre‑generation—and outlines a high‑concurrency architecture with sharding, caching, and Snowflake IDs.