There's not a lot of choice for FreeBSD users who want to run virtual machines on a FreeBSD server. There's of course Jails, which is perfect if you want to run only FreeBSD guests. And there's some development taking place in order to run Xen Dom0 on FreeBSD, but I don't think that's anywhere near usable yet.
Post tagged: freebsd
ZFS is essentially an extremely powerful filesystem, volume manager and software raid, which runs splendidly on FreeBSD. However, prior to the new bsdinstall, it had to be configured manually. Although the article is old and was originally written for 9.0-BETA, it is still valid and accurate for manual ZFS on Root configuration (if bsdinstall's defaults aren't good enough).
You probably know the situation: You love FreeBSD, you love ZFS as a filesystem (maybe even as the root filesystem?), but when it comes to virtualisation, FreeBSD users don't have a lot of choice.