> For the complete documentation index, see [llms.txt](https://huataihuang.gitbook.io/cloud-atlas-draft/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://huataihuang.gitbook.io/cloud-atlas-draft/database/mysql/install_and_upgrade.md).

# 安装和升级

MySQL安装和升级，涉及数据安全和服务稳定性。