Deduplication: a power-hungry way to streamline storage
Backing up the deduplicated blocks means less backup media is required and less bandwidth has to be set aside to perform the backups. On the other hand, it can increase restore times dramatically, as the entire set of backup media is now hopelessly interdependent.
Most people won’t back up data as deduplicated blocks – it is just too risky. The loss of one piece of backup media can render data irretrievable on all other media. This means budgeting backup bandwidth for the fully undeduplicated data to run every night.
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