Date: Wed, 20 Nov 2013 23:35:08 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Matthew Ahrens" <mahrens@delphix.com>, "Marcus Reid" <marcus@blazingdot.com> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: Defaults in 10.0 ZFS through bsdinstall Message-ID: <D73108A73AA94C1EB7FBE5CFF7091E1F@multiplay.co.uk> References: <20131114173423.GA21761@blazingdot.com> <CAJjvXiFydawETqm78A-e%2Bfvnje4BwRurs3k03j4aQRQJBt3pEA@mail.gmail.com>
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----- Original Message -----
From: "Matthew Ahrens" <mahrens@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.
Regards
Steve
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