There are many misconceptions about data deduplication, and making decisions based on those misconceptions can produce undesirable (and unplanned) results. For instance, deployment of the wrong type of deduplication typically results in:

•    Excessively high disk usage and using as much as three times the bandwidth for offsite replication, and the resulting impact on short and long-term costs
•    Slower backup storage ingest due to inline compute-intensive data deduplication that greatly slows backups down and expands the backup window
•    Slower restores, VM boots, and tape copies that can take hours or even days due to the time-consuming rehydration of deduplicated data
•    Backup windows that continue to expand with data growth

Choosing a Tiered Backup Storage solution will have a major impact on the cost and performance of your backup environment for the next three to five years because backups are written to a disk-cache Landing Zone for fastest backup performance, and then tiered to a deduplicated data repository to reduce storage and resulting storage costs.