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不同备份方法的特性比较:
|
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. |
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