>This assumes you have low volumes of deduplicated data. As your dedup
>ratio grows, so does the performance hit from dedup=verify. At, say,
>dedupratio=10.0x, on average, every write results in 10 reads.

I don't follow.

If dedupratio == 10, it means that each item is *referenced* 10 times
but it is only stored *once*.  Only when you have hash collisions then 
multiple reads would be needed.

Only one read is needed except in the case of hash collisions.


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