One of the hidden landmines of deduplication is its impact on restore performance. Most vendors gloss over this issue in their quest to sell bigger and faster systems. Credit goes to Scott from EMC who acknowledged that restore performance declines on deduplicated data in the DL3D. We have seen other similar solutions suffer restore performance degradation of greater than 60% over time. Remember, the whole point of backing up is to restore when/if necessary. If you are evaluating deduplication solutions, you must consider several questions.
- What are the implications to your business on the decreasing restore performance?
- What is it about deduplication technology that hurts restore performance?
- Can you reduce the impact on restore performance?
- Is there a solution that does not have this limitation?