Defaults in 10.0 ZFS through bsdinstall
Julian Elischer
julian at freebsd.org
Thu Nov 21 01:35:05 UTC 2013
On 11/20/13, 3:35 PM, Steven Hartland wrote:
> ----- Original Message ----- From: "Matthew Ahrens"
> <mahrens at delphix.com>
>>> I noticed a couple of things with the ZFS defaults that result from
>>> using the new installer in 10.0-BETA3.
>>>
>>> One, atime is turned off everywhere by default. There was a
>>> thread on
>>> this list on June 8 with a subject of 'Changing the default for ZFS
>>> atime to off?', and from what I can tell the idea of turning off
>>> atime
>>> by default was not a popular one.
>>>
>>>
>> It would be a pity if people compared ZFS on FreeBSD vs UFS on FreeBSD
>> (using the installer's defaults) and came to the conclusion that "Mail
>> programs don't work on ZFS on FreeBSD, use UFS instead." I think
>> it's well
>> known that there are performance differences between ZFS and UFS,
>> depending
>> on your workload. If you choose defaults that cause there to be
>> correctness differences, that could be detrimental.
>
> It would also be a pitty if users came to conclusion not to use ZFS
> because
> it wears their SSD's out much quicker than UFS does or performs much
> worse.
>
> Having a sensible default that's correctly messaged is something to
> be commended not discouraged because its not the tradition and for
> those that don't bother reading they may have issues as that could
> be said for any option.
>
> Its also not something that can't be changed in seconds either, so the
> suggestion of /var with it enabled so default mail installs work
> as normal and for those that choose to install mail folders else
> where they need to read and learn, instead of peanalising every single
> user gets my vote.
I think the installer should make a point of asking the user what they
need..
then they cannot complain if they chose something they don't want.
>
> Regards
> Steve
>
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