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How Much Are You Really Saving With Traditional Deduplication Appliances?
To start, many traditional target device-based deduplication vendors often tout data reductions in the range of 10:1 to 20:1. So, let's be conservative and use 10:1 as a dedupe ratio to see what that really amounts to in dollars saved.
So, if you are backing up 100TBs of raw data, then with a 10:1 reduction, you're storing 10TBs on the target deduplication device. This sounds great because you're saving 90TBs of disk capacity. On the other hand, if you choose not to de-duplicate the data, then you'll end up with something like 50TB on regular commodity disk (on average, assuming you still compress the data).
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