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# 多数据中心冗余——系统管理员层面的考量
- **期号**: SRE Weekly Issue #36(2016-08-21)
- **作者**: 声明:文中提到我的雇主 Heroku。
- **链接**: https://blog.serverdensity.com/multi-data-center-redundancy-sysadmin-considerations/
## 简介
这是 Server Density 关于向多数据中心架构转型经验教训系列的下一篇。里面有不少有趣的细节,比如他们如何向备用数据中心做故障切换,以及切换失败时又会怎么办。
## 正文
> ⚠️ 抓取失败:URLError: [SSL: UNEXPECTED_EOF_WHILE_READING] EOF occurred in violation of protocol (_ssl.c:1032)