> The problem is that ZFS basically can't move things. The one killer feature for me with btrfs is offline deduping (and by extension not having de-duping requ

> The problem is that ZFS basically can't move things. The one killer feature for me with btrfs is offline deduping (and by extension not having de-duping require a super computer to run). My data has enough duplication that it'd be nice to have, but not worth requiring hundreds of gigs of ram. Being able to fire off a job after importing a large set of data (or maybe yearly-ish) would be awesome and give me a few extra years without having to update my hardware.