The real gains are realized when looking at what Data Domain does in the background. The deduplication of stored byte sequences is where the technology shines. This dramatically reduces the amount of storage required for backups and reduces (if not eliminates) tape dependency. The next major benefit is the technologys ability to replicate this reduced data footprint across the WAN to practically eliminate the need for traditional offsite storage. In my opinion, these two components are the big game changers for backups. We have seen and will definitely see more vendors introduce their version of deduplication.
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