如果不支持检查升级功能，在经典GUI界面和浏览窗口界面不显示“检查升级”的菜单选项。

If not support to check for updates function, not display the menu item named "Checks for update" on Classic GUI and on Explorer window.

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滚动升级流程的第一步是检查辅助服务器是否能够转换为 ER 服务器。

The rolling upgrade process starts with a check to see if the secondary server can be transformed into an ER server.

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此外，验证还提供了一个基准功能，可以始终检查页面的更改和升级。

Additionally, validation provides a baseline functionality that you can always check changes and updates to your page against.

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