[zfs-discuss] Ubuntu 16.04 with ZFS root
rlaager at wiktel.com
Fri May 20 14:55:34 EDT 2016
On 05/20/2016 12:58 PM, Walter Parker via zfs-discuss wrote:
> As far as I can tell:
> Method 1 is install from scratch on each install (every system gets a
> clean creation)
> Method 2 is to copy a pre-installed image to the new system.
No. Method 2 is install each system from scratch as normal on ext4, then
copy that into ZFS.
There are pros and cons to each.
The data integrity thing was already mentioned. While I agree in theory,
in practice, it's probably not that big of a problem.
With method 2, you're always getting the output of the standard
installer, by definition. With method 1, I have to maintain the HOWTO to
ensure it gives you the same (or as close as possible to the same)
output as the standard installer. For example, I had to update the list
of default group memberships for 16.04.
However, maintaining a HOWTO of method 1 makes it very clear (to someone
who knows what a non-ZFS manual install looks like) what sort of extra
steps are necessary for a ZFS-on-root install. This provides targets of
what to eliminate. I did this sort of work for 16.04, reducing the steps
a bit. Eventually, we will hopefully reach the point where the only
extra work is `zpool create` and `zfs create`. At that point, it becomes
trivial-ish to integrate into the real installer.
This is why I personally think method 1 is better. I'm working a path
towards a goal of the HOWTO disappearing completely, or at least being
reduced to "here's a recommended partitioning setup for the installer".
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