文件监视程序，可以指定监视的文件目录，并将该目录内的文件变化自动备份到指定的目录中，主要用于开发过程中的自动备份或者数据库的自动异地备份操作。-surveillance procedures document can specify the directory surveillance, The directory will document changes within the automatic backup to a specific directory, the main course for the development of the automatic backup of the database or automatic off-site backup operation.