Promotion or demotion of backup data in a storage hierarchy based on significance and redundancy of the backup data

摘要

Moving backup data within a storage hierarchy based on a calculated uniqueness of the backup data and on the estimated significance of at least a portion of the backup data. More unique and significant backup data would tend to have higher availability levels. Conversely, less unique and significant backup data would tend to have lower availability levels, or may even cause the backup data to be deleted.