21CTO

Apr 6, 2020 · Operations

How Alipay Achieved Near‑Zero Downtime with Multi‑Datacenter Failover Architecture

This article explains the evolution of Alipay's high‑availability and disaster‑recovery architecture—from a simple single‑datacenter design to a multi‑datacenter, unit‑based system with failover and blue‑green deployment—highlighting the challenges, solutions, and operational benefits that enable continuous service during massive traffic spikes.