>You do realize that the age of the universe is only on the order of
>around 10^18 seconds, do you? Even if you had a trillion CPUs each
>chugging along at 3.0 GHz for all this time, the number of processor
>cycles you will have executed cumulatively is only on the order 10^40,
>still 37 orders of magnitude lower than the chance for a random hash

Suppose you find a weakness in a specific hash algorithm; you use this
to create hash collisions and now imagined you store the hash collisions 
in a zfs dataset with dedup enabled using the same hash algorithm.....


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