Instructions to restore the database using RMAN backup files

RMAN_restoration.md

Oracle Database Restoration Procedure Using RMAN

Overview

This document outlines the step-by-step procedure to restore an Oracle Database using RMAN backups. Restoration is performed on a fresh development environment.

Preconditions

• RMAN backup files must be transferred from the production backup location (F:\rman_backup) to a similar dedicated directory on the development server (F:\rman_backup).
• Database software must be installed and configured on the development server.

Restoration Steps

Step 1: Start RMAN

Open RMAN and connect to the development database instance:

rman target /

Step 2: Start Database in NOMOUNT Mode

Start the instance without mounting the database:

STARTUP NOMOUNT;

Step 3: Restore Control File

Restore the control file from the backup:

RESTORE CONTROLFILE FROM 'F:\rman_backup\backup_controlfile.bkp';

Replace 'backup_controlfile.bkp' with the exact filename of the control file backup.

Step 4: Mount the Database

Mount the database using the restored control file:

ALTER DATABASE MOUNT;

Step 5: Catalog Backup Files

Register backup files with RMAN:

CATALOG START WITH 'F:\rman_backup\';

This step ensures RMAN recognizes the backup files in their current location.

Step 6: Restore Database

Restore database files from the backup:

RESTORE DATABASE;

Step 7: Recover Database

Perform database recovery to apply archived logs:

RECOVER DATABASE;

Step 8: Open Database

Finally, open the database with reset logs:

ALTER DATABASE OPEN RESETLOGS;

Post-Restoration Verification

Perform the following checks to verify restoration success:

• Confirm database status and integrity.
• Validate object and row counts for consistency with the production database.
• Run sample queries to cross-check data accuracy.

Example verification command:

SELECT COUNT(*) FROM [important_table];

Handling Restoration Issues

In case of import or recursive dependency issues, use the following data pump import options:

impdp system/password DIRECTORY=dp_dir DUMPFILE=full.dmp LOGFILE=import.log FULL=Y DATA_OPTIONS=SKIP_FAILED_OBJECTS

This allows the restoration process to proceed smoothly, skipping problematic objects and logging errors for further inspection.

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