We got ZFS!

ZFS is there. Great! Thanks Pawel!

Now I wait a lit­tle bit until the first bugs are ironed out, and then I move all my stuff to it. The nice part: when you have 2 machines and every­thing you use is jailed, you just can do this with­out an “inter­rup­tion of ser­vice” (or at least only with a very small one). Just move the jails to the oth­er machine, replace the old FS with ZFS, and then move all jails back.