TrueNAS SCALE deduplicated pool showing wrong capacity?

[Johnny_Fartpants]

I recently stumbled across block cloning doing the same thing so wouldn’t be surprised at all if dedup is the same.

Block Cloning - Dataset Space Used

So I’ve just started messing around with block cloning today and thinking about practically how it would work in my environment. In testing it appears to be working well however I have noticed that ZFS dataset ‘USED’ doesn’t seem to understand whats going on from a reporting point of view. If I take a copy of a file (10GB) on the dataset and duplicate it block cloning is defo working as A. the copy is stupid fast and B. I can see it using zpool get all tank | grep bclone however as far as the da…