ZFS on FreeBSD is great, but its mostly ZFS is great compared to UFS/geom or ext{3,4}/LVM. svn.apache.org is using it now, we caused many panics on FreeBSD 7.x

ZFS on FreeBSD is great, but its mostly ZFS is great compared to UFS/geom or ext{3,4}/LVM. svn.apache.org is using it now, we caused many panics on FreeBSD 7.x with ZFS -- and lots of patches are now baked into 8.x, with all the patches ZFS has been great for apache.