Partial restore from tape backup

摘要

Techniques to restore data from backup are disclosed. In various embodiments, an indication of a subcomponent to be restored from backup is received. View information associated with the backup is used to determine a set of physical components required to be retrieved from the backup to restore the requested subcomponent. The determined set of physical components is retrieved from the backup. The retrieved physical components are used to restore the subcomponent. In various embodiments, the view information includes data that identifies each of a plurality of separately-recoverable subcomponents of the backup and for each one or more physical components comprising the backup which would be required to restore that subcomponent.

主权项

1. A method of restoring data from a backup that is implemented by one or more hardware processors, comprising:
receiving an indication of a subcomponent to be restored from the backup in connection with a partial restoration process; using a view information associated with the backup to determine a set of physical components required to be retrieved from the backup to restore the requested subcomponent; retrieving the determined set of physical components from the backup; and using the retrieved physical components to restore the subcomponent; wherein the view information includes data that identifies each of a plurality of separately-recoverable subcomponents of the backup and for each one or more physical components comprising the backup which would be required to restore that subcomponent, and wherein the view information is extracted from a backup data stream.