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# How we Upgraded a 22TB MySQL Cluster from 5.6 to 5.7 (in 9 months)
- **期号**: SRE Weekly Issue #72(2017-05-14)
- **作者**: —
- **链接**: https://thoughts.t37.net/how-we-upgraded-a-22tb-mysql-cluster-from-5-6-to-5-7-in-9-months-cc41b391895d
## 简介
I included this article last week, but my link was outdated and returned a 404. Here’s the corrected link — sorry about that!
## 正文
> ⚠️ 抓取失败:URLError: [SSL: UNEXPECTED_EOF_WHILE_READING] EOF occurred in violation of protocol (_ssl.c:1032)