最近準備將11GR2 Oracle Database Backup and Recovery User's Guide文檔中的東西再看看，好好研究一下備份恢復，再練習一下里面的案例。
今天先下記錄一下各種備份方法的區別，後續將每天記錄一下學習情況
官方文檔如下：
| Feature | Recovery Manager（RMAN） | User-Managed（用戶手動備份） |
Data Pump Export（數據泵導出） |
|---|---|---|---|
|
Closed database backups 數據庫關閉 |
Supported. Requires instance to be mounted. 支持。需要實例處於mount狀態。 |
Supported. 支持。 |
Not supported. 不支持。 |
|
Open database backups 數據庫開啓 |
Supported. No need to use 支持。不需要使用BEGIN/END BACKUP語句 |
Supported. Must use 支持。需要使用BEGIN/END BACKUP語句 |
Requires rollback or undo segments to generate consistent backups. 需要回滾段或undo段來生成一致性備份 |
|
Incremental backups 增量備份 |
Supported. 支持。 |
Not supported. 不支持。 |
Not supported. 不支持。 |
|
Corrupt block detection 壞塊檢測 |
Supported. Identifies corrupt blocks and logs in 支持。識別壞塊並記錄在V$DATABASE_BLOCK_CORRUPTION |
Not supported. 不支持。 |
Supported. Identifies corrupt blocks in the export log. 支持。識別壞塊記錄在export日誌中 |
|
Automatic specification of files to include in a backup 備份中自動規範文件 |
Supported. Establishes the name and locations of all files to be backed up (whole database, tablespaces, data files, control files, and so on). 支持。創建所有文件備份的name和位置 |
Not supported. Files to be backed up must be located and copied manually. 不支持。備份文件需要手動拷貝到某個位置 |
Not applicable. 不適用。 |
|
Backup repository 備份知識庫 |
Supported. Backups are recorded in the control file, which is the main repository of RMAN metadata. Additionally, you can store this metadata in a recovery catalog, which is a schema in a different database. 支持。備份記錄在控制文件中，控制文件時RMAN元數據的主要知識庫。除此以外，可以儲存在catalog庫中 |
Not supported. DBA must keep own records of backups. 不支持。DBA需要保留備份記錄。 |
Not supported. 不支持 |
|
Backups to a media manager
|
Supported. Interfaces with a media manager. RMAN also supports proxy copy, a feature that allows a media manager to manage completely the transfer of data between disk and backup media. |
Supported. Backup to tape is manual or controlled by a media manager. |
Not supported. |
|
Backup of initialization parameter file 備份初始化參數文件 |
Supported. 支持。 |
Supported. 支持。 |
Not supported. 不支持。 |
|
Backup of password and networking files 備份密碼和networking文件 |
Not supported. 不支持。 |
Supported. 支持。 |
Not supported. 不支持。 |
|
Platform-independent language for backups 獨立語言平臺for backups |
Supported. 支持。 |
Not supported. 不支持。 |
Supported. 支持。 |