Tech Freedom Circle

Aug 4, 2025 · Operations

How Do Projects Achieve High Availability Without Multi‑Site Active‑Active? – A Meituan Interview Question

The article analyzes high‑availability concepts, from single‑machine risks to multi‑site active‑active architectures, compares cold and hot backup strategies, discusses network latency challenges, and presents Ele.me’s cell‑based, sharding‑driven multi‑region solution with concrete examples, tables, and code snippets.