You can use the Commvault software, with the RMAN interface, to back up Amazon RDS for Oracle instances.
Backups
Data You Can Back Up
Oracle user databases (data)
Oracle archive logs
Data You Cannot Back Up
You can use a file server agent to back up the following content, which is not included in backups of Oracle databases:
Operating system data
Oracle application files
Oracle server system databases
Backups You Can Perform
Full backups
Incremental backups
Archive log 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
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
You can restore to the following out-of-place destinations:
A different Oracle instance that runs in Amazon EC2
An on-premises instance