Dell DR4000 - Manual (Page 23)

23 Setting up IBM TSM on the Dell™ DR4X00 Disk Backup Appliance
4 Monitoring Dedupe, Compression & Performance
After backup jobs have run the DR4X00 will track Capacity, Storage Savings and Throughput on the
DR4X00 dashboard. This information is valuable in understanding the benefits the DR4X00.
NOTE: Deduplication ratios increase over time, it is not uncommon to see a 2- 4x reduction (25- 50% total
savings) on the initial backup. As additional full backup jobs complete the ratios will increase. As
mentioned before backup jobs with 12 week retention will average a 15x ratio in most cases.