What retention assumptions are built into the model?
This model focuses on two aspects of retention requirements. The first is specified by the user and ranges between 4, 8 or 12 weeks (roughly 30, 60 or 90 days) to keep all produced backup images (daily full and weekly full/ daily incremental). The second addresses retention after this period. The assumption is that some number of additional full backup images will be retained at the monthly, quarterly and yearly intervals. The current assumption is that over a three year period, monthly backups are retained for year 1, quarterly backups for year 2 and year end backups for year 3. This adds about 10-12 additional full backups to the retention sizing estimates. Contact your local sales team if you would like to try this analysis using several other sizing factors.
