In his article about “Elegantly-simple multibooting and OS upgrades with ZFS Boot Environments and bhyve”, Michael Dexter describes how he uses OpenZFS boot environments to not only make it stay current with FreeBSD 11 snapshots, but also to boot new boot environments under the bhyve hypervisor.

bhyvezfsdexter

Full article: http://callfortesting.org/bhyve-boot-environments/