在备份到一个目录时，必须有该目录的写权限，并且应确保有足够的磁盘空间来包含备份的数据。
You must have write permission to the directory while performing the backup to a directory and should ensure sufficient disk space is available to contain backed-up data.
可以轻松地配置系统，使之在日志文件被写满时自动备份日志文件。
You can easily configure your system to automatically backup a log file when it is full.
可以轻松地配置系统，使之在日志文件被写满时自动备份日志文件。
You can easily configure your system to automatically backup a log file when it is full.
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