I'm new to Solaris 11 and I have to apply updates. I read that you can create a ZFS snapshot -- apply updates -- then revert the snapshot if things break. I also read that you can create a backup of your boot environment (BE).
What is the difference between taking a ZFS snapshot versus creating a BE backup? Are certain files/directories backed up by one and not the other?
Clarification on the two and a recommendation on which to use for patching (or best practices) would be greatly appreciated.