A: for starters, when I get asked this question, I typically say you don't need multiple data centers for high availability — you only need one, with sufficient capacity.

答：对于新手，我对此问题的回答通常是“您不需要使用多个数据中心来获得高可用性，仅需要一个容量足够大的数据中心集合获得高可用性”。