What are the main methods for Oracle database backup?

Oracle database provides five backup methods: full backup, incremental backup, archive log backup, flashback backup and cloud backup. Choosing the best method depends on data recovery target time, data volume, storage space, security and compliance requirements.

Oracle database backup method

Oracle database provides a variety of backup methods to ensure data security and Availability. These methods include:

1. Full backup

• Create a complete copy of the database.
• Capture the entire state of the database, including data, metadata and control files.
• Create using backup tool RMAN.

2. Incremental backup

• Only backs up data blocks that have changed since the last full backup.
• Smaller and faster than full backup.
• Create using the RMAN or ALTER DATABASE ... BACKUP INCREMENTAL ... statement.

3. Archive log backup

• Back up the log files of transactions executed by the database.
• Essential for recovering a crashed or damaged database.
• Create using RMAN or ALTER SYSTEM ARCHIVE LOG ... statement.

4. Flashback backup

• Create a backup of the database at a specific point in time.
• Allows the database to be restored to that specific point in time.
• Create using the RMAN or FLASHBACK DATABASE ... TO ... statement.

5. Cloud Backup

• Store database backup in a cloud storage service.
• Provides offline backup, data protection and disaster recovery.
• Services provided by third-party cloud providers.

Choose a backup method

Choosing the best backup method depends on several factors, including:

• Data recovery goals Time
• Data volume
• Available storage space
• Security and compliance requirements

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