預防最壞情況：Vercel 核心資料庫容錯移轉（Failover）實戰測試解析
Original: Preparing for the worst: Our core database failover test
As a cloud platform hosting millions of websites and applications worldwide, Vercel's core database — which stores user accounts, project…
Vercel 近期進行了核心資料庫的容錯移轉（Failover）演練，旨在測試極端故障發生時系統的韌性。本次測試模擬了主資料庫失效的情境，驗證自動切換至備份資料庫的流暢度。文章詳細記錄了準備工作、執行過程中的連線池調整、應用程式重試機制，以及最終達成的低中斷時間，為現代雲端架構提供了寶貴的災難復原實踐經驗。對於依賴 Vercel 託管服務的開發者而言，這展現了其基礎設施的穩定性。
As a cloud platform hosting millions of websites and applications worldwide, Vercel's core database — which stores user accounts, project configurations, deployment metadata, and more — must maintain extremely high availability. To verify the system's ability to recover from real hardware failures or data center outages, Vercel's Site Reliability Engineering (SRE) team conducted a live "core database failover drill" and documented their experience.
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