Main backup types include: full backup (creating a complete copy of the database), incremental backup (backing up data changed since the last backup), archive log backup (backing up applied changes), RMAN backup (providing Various backup options), Snapshot Backup (creates file system snapshots), Cloud Backup (stores backups in the cloud). The type you choose depends on database size, storage space, recovery time, and data point objectives.
Main types of Oracle database backup
Oracle database provides multiple backup types to meet different data protection needs and recovery needs. The main types include:
1. Full Backup
- Create a complete copy of the database, including data files, control files and redo log files .
- Provides the highest level of protection, but the longest recovery time.
2. Incremental Backup
- Only backs up data blocks that have changed since the last full backup.
- The recovery time is faster than a full backup, but requires additional database version information.
3. Archive Log Backup
- Back up archive logs that have been applied to the database but have not been merged into the data files.
- Used to restore and recover database changes from the last backup.
4. RMAN Backup (Recovery Manager Backup)
- Backup and recovery tool provided by Oracle.
- Provides various backup options including full, incremental and archive log backups.
- Simplify backup and recovery operations.
5. Snapshot backup
- Back up the database by creating a file system snapshot of the database.
- Provides fast, consistent backups, but may not include all database metainformation.
6. Cloud Backup
- Store database backup in a cloud storage service.
- Provides off-site backup and disaster recovery functions.
Selecting a backup type depends on the following factors:
- Database size and complexity
- Available storage space
- Recovery time objectives (RTO)
- Recovery Point Objective (RPO)
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