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5 Database Recovery


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- Perform complete or incomplete user-managed recovery.
- Identify situations where incomplete recovery is necessary.
- Perform complete or incomplete recovery by using RMAN.
- Perform incomplete recovery based on time, SCN, log sequence, restore points, or the cancel method.
- Recover an automatically backed up control file.
- Complete Incomplete Control file RO TBS.
- User-managed recovery.
- User-Managed Recovery:.
- Restore all database files from a backup and then recover the database:.
- Restore the damaged data files from a backup and then recover the data files:.
- RECOVER DATABASE.
- Complete Versus Incomplete Recovery.
- Complete recovery brings the database up to the present, including all data changes made to the point in time when the recovery was requested..
- Incomplete recovery brings the database up to a specified point in time in the past, before the.
- Missing transactions after incomplete recovery Restore from.
- data files Data files containing Recovered Changes applied.
- log Online Redo log.
- Incomplete Recovery.
- Data files containing committed and.
- PIT-recovered data files Undo applied.
- Restored data files from as far back as necessary.
- Incomplete Control file RO TBS.
- Incomplete Recovery (notes only slide).
- Situations Requiring Incomplete Recovery.
- A backup of the control file is used to open or recover the database..
- Types of Incomplete Recovery.
- There are four types of incomplete recovery:.
- Time-based recovery.
- Cancel-based recovery.
- Change-based recovery.
- Types of Incomplete Recovery (notes only slide).
- Performing User-Managed Incomplete Recovery.
- Recover a database until time:.
- Recover a database until cancel:.
- Recover using the backup control file:.
- RECOVER DATABASE UNTIL CANCEL;.
- RECOVER DATABASE UNTIL.
- To perform user-managed incomplete recovery, follow these steps:.
- Shut down the database..
- Restore data files..
- Mount the database..
- Recover the database..
- Open the database with the RESETLOGS option..
- User-Managed Time-Based Recovery:.
- You decide to perform incomplete recovery to restore the database back to its state as of 15 minutes ago..
- User-Managed Time-Based Recovery Steps (notes only slide).
- User-Managed Cancel-Based Recovery:.
- The missing redo log is not archived..
- Recover the database as follows:.
- Restore all data files from the most recent backup..
- You already have a valid backup, so mount the database..
- Execute RECOVER DATABASE UNTIL CANCEL.
- Execute ALTER DATABASE OPEN RESETLOGS to open the database..
- Performing Incomplete Recovery by Using RMAN.
- Restore all data files..
- Recover the database by using UNTIL TIME , UNTIL SEQUENCE , or UNTIL SCN.
- Open the database by using RESETLOGS.
- Time-Based Recovery Using RMAN: Example.
- RECOVER DATABASE;.
- Incomplete Recovery Using Enterprise Manager.
- Incomplete Recovery and the Alert Log.
- The following are some best practices regarding the alert log in incomplete recovery scenarios:.
- Is stored in the control file.
- RECOVER DATABASE – FLASHBACK DATABASE – FLASHBACK TABLE.
- Incomplete Recovery: Best Practices.
- Investigate and verify that incomplete recovery is necessary..
- Incomplete Recovery Best Practices (notes only slide).
- Recovering a Control File Autobackup.
- Control file RO TBS.
- Recovering a Control File Autobackup (notes only slide).
- Creating a New Control File.
- Redo log file 1B Redo log.
- Redo log file 2B Redo log.
- Recovering Read-Only Tablespaces.
- Read-only.
- Read-only Read-only.
- Control file backup to be used for recovery if current one lost.
- Complete Incomplete Control file.
- Recovering Read-Only Tablespaces (notes only slide).
- Read-Only Tablespace Recovery Issues.
- Special considerations must be taken for read-only tablespaces when:.
- Re-creating a control file.
- Renaming data files.
- Using a backup control file.
- Read-Only Tablespace Recovery Issues (notes only slide).
- Recover a control file autobackup.
- Recover read-only tablespaces.
- Practice Overview: Performing Incomplete Recovery

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