Similar questions here. It's unclear to me how I can integrate this into my system and how to go about it. I'd hate to have to blow away my zpool to do this.

My zpool isn't very full. Maybe I can make a new dataset that's encrypted and move everything from the unencrypted dataset to the encrypted dataset. Of course, being able to encrypt in place would be most ideal, but I'll settle for it being a painless operation that doesn't require blowing away a zpool.