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NetVault Plug-in for Oracle 10.0.5 - User Guide

Introducing Dell™ NetVault™ Backup Plug-in for Oracle® Defining a backup strategy Installing and removing the plug-in Configuring the plug-in Backing up data Using the Oracle® Flashback Database Restoring data
Restoring and recovering data: an overview Performing User Managed restores Using advanced User Managed restore procedures Performing RMAN restores Using RMAN types of recovery in a non-RAC environment Using advanced procedures with RMAN restores
Maintaining the Recovery Catalog Using the RMAN CLI Using the Plug-in with Oracle® RAC Using the Plug-in in a failover cluster environment Using the plug-in with Oracle® Data Guard Troubleshooting Glossary

Reviewing the RMAN Tablespace and Datafile backup types

The Incremental Backups are further classified as follows:
An RMAN Full Backup is a backup of a datafile that includes every allocated block in the file being backed up. A Full Backup of a datafile can be an image copy, in which case every data block is backed up. You can also store it in a backup set, in which case datafile blocks not in use may be skipped. An RMAN Full Backup cannot be part of an Incremental Backup strategy, that is, it cannot be the parent or base of a subsequent Incremental Backup.
Level 0 Incremental Backup: A Level 0 Incremental Backup, which is the base for subsequent Incremental Backups, copies all blocks containing data, backing up the datafile into a backup set just as a Full Backup would.
Level 1 Incremental Backup: A Level 1 Incremental Backup can be either of the following types:
Cumulative Incremental Backup: In a Cumulative Incremental Backup, RMAN backs up all the blocks used since the most recent Level 0 Incremental Backup. Cumulative Incremental Backups speed up restores by reducing the number of Incremental Backups you need to include in the recovery process. Cumulative Backups require more space and time than Differential Backups because they duplicate the work done by previous backups at the same level.
Differential Incremental Backup: In a Differential Incremental Backup, RMAN backs up all blocks that have changed since the most recent Cumulative or Differential Incremental Backup, whether at Level 1 or Level 0.

Reviewing the Control File backup types

Manual Backup of Control File with User Managed backup method: With the User Managed backup method, the plug-in does not use the active Control File for backup and restore. During backup, the plug-in saves a snapshot of the Control File to the user-specified Control File Save Filename (Full Path), and then backs up this copy of the Control File. This process ensures that a consistent copy of the Control File is protected. During restoration, the plug-in restores the Control File to the Control File Save Filename (Full Path) to ensure that the active Control File is not inadvertently overwritten. You must manually copy this file to the original location as required. To ensure that a recent copy of the Control File is always available, include it with each User Managed backup.
Manual Backup of Control File with RMAN backup method: When Control File Autobackups are disabled and the Control File node is explicitly selected on the NetVault Backup Selections page, the plug-in uses RMAN’s BACKUP CURRENT CONTROLFILE to back up the Control Files. To ensure that a recent copy of the Control File is always available, include it with each RMAN backup.

Reviewing the other backup types

For example, you can duplicate the production database on hostA to hostB, and then use the duplicate database on hostB to practice restoring and recovering this database without damaging the production database.

Flash Recovery Area (FRA) backups

Oracle® introduced FRA in Oracle 10g. FRA is a disk location used to store recovery-related files such as Control Files, archived redo logs, and RMAN backups. Oracle and RMAN manage the files in the FRA automatically.
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