About spreading the workload
You can use Vault to duplicate backup images daily and eject volumes weekly. Duplication occurs every day rather than one day only, spreading the workload evenly throughout the week. The media remains in the robot until it is due to be collected by the vault vendor.
For example, if the vault vendor picks up the media every Friday, you can do the following:
Configure a Vault profile to do duplication only, and configure a vault policy to run this profile every day of the week.
Configure a second Vault profile to do the catalog backup and eject steps. This profile should use the same image selection criteria as the profile that duplicates images. Configure a Vault policy to run this profile before the vault vendor arrives on Friday.
This method for duplicating and ejecting media provides the added benefit of consolidated reports that are not organized by session.