不同備份方法的特性比較

Feature

Recovery Manager

User-Managed

Export

Closed database backups

Supported.Requires instance to be mounted.

Supported.

Not supported.

Open database backups

Supported.No need to use BEGIN/END BACKUP statements

Supported.Must use BEGIN/END BACKUP statements.

Requires rollback or undo segments to generate consistent backups.

Incremental backups

Supported.

Not supported.

Not supported.

Corrupt block detection

Supported.Identifies corrupt blocks and logs in V$DATABASE_BLOCK_CORRUPTION.

Not supported.

Supported.Identifies corrupt blocks in the export log.

Automatic record keeping of files in backups

Supported.Establishes the name and locations of all files to be backed up (whole database,tablespace,datafile or control file backup)

Not supported.Files to be backed up must be specified manually.

Supported.Performs either full,user,or table backups.

Recovery catalogs

Supported.Backups are recorded in the RMAN Repository,which is contained in the control file and optionally in the recovery catalog database.

Not supported.DBA must keep own records of backups.

Not supported.

Backups to media manager

Supported.Interfaces with a media manager.RMAN also supports proxy copy,a feature that allows the media manager to manager the transfer of data.

Supported.Backup to tape is manual or controled by a media manager.

Supported.

Backs up initialization parameter file

Supported.

Supported.

Not supported.

Backs up password and networking files

Not supported

Supported.

Not supported.

Platform-independent language for backups

Supported.

Not supported.

Supported.