什么叫做服务器升级中?避坑清单与0宕机方案,服务器升级无忧,避坑指南与零宕机升级方案
What does "server upgrade in progress" mean? A list of pitfalls to avoid and a zero-downtime solution, ensuring worry-free server upgrades. A guide to avoiding pitfalls and a zero-downtime upgrade solution
以上为机器翻译结果，长、整句建议使用 人工翻译 。