Summary of Oracle database backup deletion methods and precautions

Oracle database backup is one of the important means to ensure the security of database data. There are many ways to back up, but deleting database backup is also one of the important steps in operating backup. This article mainly introduces how to delete Oracle database backup and issues that need attention.

1. How to delete Oracle database backup

1. Use RMAN to delete backup

RMAN is the backup and recovery tool that comes with the Oracle database. You can use the following Command to delete backups:

DELETE BACKUPSET [backup_set_list] [all] [completed] [force] [archivelog]

Among them, backup_set_list specifies the list of backup sets to be deleted, all refers to deleting all backup sets, completed refers to deleting completed backup sets, force refers to forcibly deleting backup sets, and archivelog refers to deleting archive logs. Backup. For specific usage methods, please refer to Oracle's official documentation.

2. Manually delete backup files

When using third-party tools to back up the database, the backup files may be stored on disk or other media. In this case, you can manually delete backup files. Delete the backup by deleting the backup file. The specific steps are as follows:

(1) Confirm the backup file storage location. Generally, backup files are stored in a specific directory, such as the /opt/backup folder;

(2) Use the rm command to delete Specify the backup file, for example:

rm -rf backup_20220102.bak

where backup_20220102.bak is the name of the backup file to be deleted.

2. Precautions for deleting Oracle database backup

1. Before deleting the backup file, you need to confirm whether the database is running normally, especially when deleting RMAN backup. If the database is undergoing backup or archiving operations, do not forcefully delete the backup set to avoid affecting the normal operation and data integrity of the database.

2. When deleting backup files, you should pay attention to the time range and backup type of the backup files. Generally speaking, backup files should be retained at certain intervals to ensure that the data can be restored to a certain point in time. The backup type should also be chosen based on the backup strategy.

3. Before deleting the backup file, the backup file should be verified to ensure that the backup file is intact and can be restored to the specified point in time. To verify backup files, you can use the RMAN tool provided by Oracle or a third-party backup and recovery tool.

4. After deleting the backup file, the backup information should be deleted promptly to avoid confusion or misoperation of the backup set information. You can use RMAN commands or manually delete backup set information.

5. Deletion of backup files must be confirmed and verified in many aspects to avoid data loss and incomplete data caused by accidental deletion or improper deletion.

3. Summary

Database backup is an important means to ensure data integrity and security. Deleting backup files is also one of the necessary steps for backup operations. When deleting backup files, multiple confirmations and verifications are required to ensure data integrity and security. It is recommended to configure both automatic backup and manual backup when backing up the database, so as to meet different backup cycles and flexible data recovery needs.

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