RMAN(Recovery Manager)是一种用于备份(backup)、还原(restore)和恢复(recover)数据库的 Oracle 工具。RMAN只能用于ORACLE8或更高的版本中。它能够备份整个数据库或数据库部件，如表空间、数据文件、控制文件、归档文件以及Spfile参数文件。RMAN也允许您进行增量数据块级别的备份，增量RMAN备份是时间和空间有效的，因为他们只备份自上次备份以来有变化的那些数据块。而且，通过RMAN提供的接口，第三方的备份与恢复软件如veritas将提供更强大的备份与恢复的管理功能。通过RMAN，也提供了其它更多功能，如数据库的克隆、采用RMAN建立备用数据库、利用RMAN备份与移动裸设备(RAW)上的文件等工作将变得更方便简单。9i的RMAN通过增强的自动配置与管理功能，以及特有的块级别的恢复，将使备份与恢复工作变得更加快捷与完美。-RMAN (Recovery Manager) is an Oracle tool for backing up, restoring, and recovering s. RMAN can only be used in ORACLE8 or later. It can back up the entire　or　components such as tablespaces, datafiles, control files, archive files, and Spfile parameter files. RMAN also allows you to make incremental block-level backups. Incremental RMAN backups are time and space efficient because they only back up those blocks of data that have changed since the last backup. Moreover, through the RMAN interface, third-party backup and recovery software such as veritas will provide more powerful backup and recovery management. RMAN also provides additional features such as　cloning, the use of RMAN to set up a standby , and the use of RMAN to back up and move files on raw devices (RAW), etc., will be much easier and simpler. 9i s RMAN makes backup and restore work faster and more seamless with enhanced auto-configuration and management features, and unique block-level recovery.