You can use the Commvault software to back up and restore Google Cloud Spanner.
Backups
Data You Can Back Up
Cloud Spanner instances
Cloud Spanner databases
Backups You Can Perform
Full backups
When You Can Perform Backups
On a schedule: The server plan that you assign manages scheduled backups
On demand: You can perform on-demand backups at any time
Restores
What You Can Restore
Entire instances
Individual databases
Backups You Can Use for Restores
The most recent backup: For example, restore the most recent backup to its original location
A backup from a specific date: For example, restore data to a point in time before it became unusable
Backups from a date range: For example, restore data that was accidentally deleted
Destinations You Can Restore To
The current location (in place)
Restore an entire instance
Restore a database to the instance that it was backed up from
A different location (out of place)
Restore an entire instance to a different project
Restore a database to a different instance