Our plan is to release a public beta soon(tm) which includes OpenZFS support and changes which Plugin authors need to be aware of.  Posting this now as a sneak peak, more detail will follow.  That said....   ZFS support: this will let you create a named pool similar to how you can create named btrfs pools today.  You will have choice of various zfs topologies depending on how many devices are in the pool.  We will support single 2, 3, and 4-way mirrors, as well as groups of such mirror