What tiering policy should a customer use when the backup data is hardly accessed?

Using a snapshot-only tiering policy for backup data that is rarely accessed is a strategic approach. This policy allows the customer to take point-in-time snapshots of their data, which means rather than storing entire copies of the data or frequently accessed versions, only the changes made since the last snapshot are stored. This is particularly efficient for managing storage resources, as it minimizes the amount of data retained and saves space, thereby reducing costs related to storage.

This method is ideal for infrequently accessed backup data because it focuses on maintaining a lightweight, efficient backup solution without burdening the storage system with unnecessary data duplication. Additionally, snapshot-only policies can provide rapid recovery options when needed without the overhead associated with managing larger volumes of data.

Other policies, such as "Vault," generally involve archiving data for long-term retention rather than optimizing for infrequent access, which might not be ideal for the context of rarely accessed data. Similarly, "All" would suggest retaining all data without consideration for access frequency, leading potentially to increased storage costs. "Auto" may imply automatic tiering that adjusts based on usage patterns but doesn't specifically target the needs of infrequent access scenarios as effectively as the snapshot-only approach does.