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Old 6th October 2011
J65nko J65nko is offline
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Default Deduplication: a power-hungry way to streamline storage

From http://www.theregister.co.uk/2011/10...deduplication/

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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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Old 7th October 2011
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It’s easy to imagine why. Try to compress 5GB of text files into a zip ball. Now, picture your hard drive as a half-petabyte zip ball that you are reading from and writing to at 10Gbit/s. Processing power is suddenly very important.
Seems that they mess 'compression=on' with 'dedup=on' ...
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