Oracle Database 2 Day DBA 11g Release- P10

Oracle Database 2 Day DBA 11g Release- P10:Oracle Database 2 Day DBA is a database administration quick start guide that teachesyou how to perform day-to-day database administrative tasks. The goal of this guideis to help you understand the concepts behind Oracle Database. It teaches you how toperform all common administrative tasks needed to keep the database operational,including how to perform basic troubleshooting and performance monitoringactivities.
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Oracle Database 2 Day DBA 11g Release- P10 Displaying Backup Reports Validating Backups for Restore Operations You can test whether or not a sufficient set of backups exists that can be used to restore the specified database files. After you specify which tablespaces to restore and, possibly, a time as of which to restore them, RMAN selects a set of backups that contain the needed data. RMAN reads the selected backups in their entirety to confirm that they are not corrupt, but does not produce output files. Validating the restoration of files tests whether or not the file can be restored given the available backups, but it does not test whether or not all backups of the specified object are valid. To verify whether or not specified database files can be restored: 1. On the Database Home page, click Availability to display the Availability subpage. 2. In the Availability page, click Perform Recovery. The Perform Recovery page appears. 3. In the User-Directed Recovery section, select Datafiles or Tablespaces from the Recovery Scope list, depending on what you want to validate. 4. For the Operation Type, select Restore Datafiles or Restore Tablespaces and then click Recover. The Perform Object Level Recovery page appears. 5. Click Add to add tablespaces or datafiles for the validate operation. After making your selections, click Next. The Perform Object Level Recovery: Restore page appears. 6. In the Backup Selection section, specify which backups should be restored. 7. In the Backup Validation section, select Validate the specified backup without restoring the datafiles. Then, click Next. The Perform Object Level Recovery: Review page appears. 8. Click Submit Job to run the validation. The Perform Recovery: Result page appears. See Also: ■ Oracle Database Backup and Recovery Users Guide to learn how to use the RESTORE ... VALIDATE commandDisplaying Backup Reports Backup reports contain summary and detailed information about past backup jobs run by RMAN, including both backups run through Oracle Enterprise Manager Database Control (Database Control) and the RMAN command-line client. To display backup reports: 1. On the Database Home page, click Availability to display the Availability subpage. 2. In the Availability page, in the Backup and Recovery section, click Backup Reports. Performing Backup and Recovery 9-17Managing Backups The Backup Reports page contains a list of recent backup jobs. You can use the Search section of the page to restrict (filter) the backups listed by the status of the job, the start time of the backup, and the type. In the Search sections, specify any filter conditions and click Go. 3. Click the link in the Backup Name column to display detailed information about any backup. The Backup Report page is displayed for the selected backup. 4. Click the link in the Status column to view a log of RMAN output for the job. Note: The control file view V$RMAN_OUTPUT contains the output of recent RMAN jobs. The contents of this view are not preserved when the instance is restarted. Therefore, the output from past RMAN jobs may not be available.Managing Backups As part of a backup strategy, you need to manage database backups. A related task is managing the record of those backups in the RMAN repository. Oracle Enterprise Manager Database Control (Database Control) simplifies these tasks.About Backup Management An essential part of a backup and recovery strategy is managing backups after you create them. Backup management includes deleting obsolete backups and performing periodic checks to ensure that backups are available and usable. You can perform backup management tasks from the Manage Current Backups page. This page has two subpages: Backup Sets and Image Copies. Both pages have similar purposes: listing backups based on the record in the RMAN repository and enabling you to manage the backups.9-18 Oracle Database 2 Day DBA Managing BackupsA backup recorded in the RMAN repository has one of the following status values:■ Available, meaning that the backup is still present on disk or tape, as recorded in the repository■ Expired, meaning that the backup no longer exists on disk or tape, but is still listed in the repository■ Unavailable, meaning that the backup is temporarily not available for data recovery operations (because, for example, it is stored on a tape that is stored offsite or on a disk that is currently not mounted)Backups can also be obsolete. An obsolete backup is, based on the currently configuredretention policy, no longer needed to satisfy data recovery goals.Maintenance tasks that you can perform in Database Control include the following: ...