Thx fungalnet.
Well, listen carefully. I took the decision to put everything about zfs in a dedicated repository. It will make things a lot clearer for everyone.
Users who will be interested in zfs will only have one thing to do, enable [obzfs] repository.
From there, the next steps are:
pacman -Sy
pacman -S grub-zfs
Next you have the choice to install zfs-linux or zfs-dkms.
pacman -S zfs-linux
zfs-linux is the last stable OpenZFS built for the latest Arch linux kernel. So we have at this time OpenZFS 0.8.2 for Arch Linux 5.3.1.arch1-1.
zfs-linux is a good option for most people, however if a new Linux version is released to core, but the latest stable release of OpenZFS does not support it, it is not possible to perform a system update. It is possible to tell pacman to ignore updates to the linux package in /etc/pacman.conf and keep the system up-to-date, minus the kernel.
pacman -S zfs-dkms
Note: You need the kernel headers.
These packages support all kernels, but need to be automatically rebuilt on every kernel update on the users machine. I can tell you that on my machine ( Phenom II X2 ) it takes a few minutes.
At first I used zfs-dkms, but now I have a preference for zfs-linux.
Questions, bug report or simply share your ZFS knowledge ? Do not hesitate. ZFS is a really great and modern file system. For my first test on Obarun, it's fantastic.
Happy snapshot :)