NetBackup™ Web UI Microsoft SQL Server Administrator's Guide
- Introducing the NetBackup web user interface
- About NetBackup for SQL Server
- Installation and host configuration
- Monitoring and notifications
- Managing SQL Server discovery and credentials
- Managing protection plans for SQL Server
- Protecting SQL Server
- Restoring SQL Server
- Using instant access with SQL Server
- Prerequisites when you configure an instant access SQL Server database
- Protecting SQL Server with VMware backups
- Troubleshooting
Using copy-only snapshot backups to affect how differentials are based
When you use both full backups and snapshot backups to protect SQL Server, the previous snapshot backup expires after the next snapshot backup is created. If you require a point in time restore before the latest backup, the differentials are based on a snapshot backup that no longer exists. Alternatively, NetBackup lets you create copy-only backups that are out-of-band so the backup does not reset the differential baseline. Differential backups are then based on the last full backup.
If a failure occurs and is detected immediately, you can restore the last full backup. Then you can replay the necessary transaction logs to achieve recovery. However, if a failure is not detected until after the next full backup, then there are no snapshot backups available to restore. When you use copy-only backups, each differential is instead based on the last full backup that is not copy-only. You can restore the last full backup, restore the latest differential backup, then restore the necessary transaction log backups before the error occurred.