Choosing the type of restore operation to perform

Use following general guidelines to help you decide whether to use a point-in-time restore or an up-to-the-minute restore:

• Capabilities
• Requirements and limitations
• Point-in-time restore from the most recent backup

Related topics

• Understanding SnapManager Restore
• Types of SnapManager restore operations

Capabilities  

Often you can choose a restore type based on the particular restore capabilities needed.

• If you want to roll forward all the transactions up to the most current time, use an up-to-the-minute restore.
• If you want to recover the databases as they were at a particular point in time, for example, at the point when the most recent backup was created, use a point-in-time restore.

Requirements and limitations  

Before choosing a restore type, be aware of the requirements and limitations of each.

• For to an up-to-the-minute restore to succeed, a contiguous set of all required transaction log backups must be in the SnapInfo folder.
• After a point-in-time restore of a backup that is not the most recent one, all existing backups become point-in-time restorable only. Backups created after the restore will be available for up-to-the-minute restores.

Point-in-time restore from the most recent backup  

Use caution when selecting a point-in-time restore from the most recent backup. After a point-in-time restore of the most recent backup, you can still perform an up-to-the-minute restore from any backup, including the most recent backup. However, any transactions that occurred between when you created the last backup and before you performed the point-in-time restore will not be restored. The reason for this is that when you perform the point-in-time restore, the transaction logs containing transactions recorded after the selected backup are removed.

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Last updated: 01-Sep-2006 07:41:19