These migrations are all saved and time-stamped, to make it possible to roll back to previous versions of the data structure.
这些迁移操作都会保存，并加上时间戳，让我们可以回滚到数据库结构的上一个版本。
With this symlink in place and each deployment in a separate directory, it is easy to roll back to previous versions of the application.
有了这个符号链接及每一个位于单独目录的部署，应用程序就可以轻松回滚到之前的版本。
During the outage, a reboot is all you need, and if you want to roll back to the earlier instance (now the standby), it's only a reboot away.
在运行中断期间，只需要进行一次重启；如果需要回滚到之前的实例(现在是备用实例)，也只需进行一次重启。
The number of requests for a storage engine to roll back to a savepoint.
存储引擎回滚到一个保存点的请求。
You can save the current state of the file before the user changes it and then roll back to that at a later point.
你可以在用户改变文件之前保存当前的状态，之后可以进行恢复。
Source control allows you to "roll back" to a previous iteration of a file to restore the status quo or to recover from an error.
源代码控制系统允许用户“回滚”到以前的文件版本，从而恢复以前的状态或从错误中恢复。
Source control allows you to "roll back" to a previous iteration of a file to restore the status quo or to recover from an error.
源代码控制系统允许用户“回滚”到以前的文件版本，从而恢复以前的状态或从错误中恢复。
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