FreeBSD 9.2 brings a very nice update to ZFS : LZ4 compression. Upgrading from 9.1 to 9.2 is quite easy if you have a standard install (no customization of the code).
The basic process, which should work for other versions as well is this:
1) Get your system up-to-date with the latest patches for your version of FreeBSD. This isn't necessary, but I think may avoid some problems.
freebsd-update fetch
freebsd-update install
reboot
2) Upgrade the kernel
freebsd-update upgrade -r 9.2-RELEASE
freebsd-update install
reboot
3) Update userland (finishes off the 2 part install)
freebsd-update install
reboot
4) Update pkg if needed
pkg update
5) Enjoy
With my 9.1 -> 9.2 update, I didn't have any messy mergemaster conf files to pour through, nor did my packages notify me that I needed to upgrade them - One of the more painless upgrades I've made.
The basic process, which should work for other versions as well is this:
1) Get your system up-to-date with the latest patches for your version of FreeBSD. This isn't necessary, but I think may avoid some problems.
freebsd-update fetch
freebsd-update install
reboot
2) Upgrade the kernel
freebsd-update upgrade -r 9.2-RELEASE
freebsd-update install
reboot
3) Update userland (finishes off the 2 part install)
freebsd-update install
reboot
4) Update pkg if needed
pkg update
5) Enjoy
With my 9.1 -> 9.2 update, I didn't have any messy mergemaster conf files to pour through, nor did my packages notify me that I needed to upgrade them - One of the more painless upgrades I've made.