Defaults in 10.0 ZFS through bsdinstall

[Mark Felder]

On Thu, Nov 14, 2013, at 12:35, Teske, Devin wrote:
> 
> I have never heard a good argument for having atime on. The performance
> penalty on ZFS is quite large, and it also makes your snapshots grow
> constant. If you have a use for it, you can turn it on I guess. This
> would be solved by having the dataset editor we're planning for 10.1
> 

POLA and POSIX, even though it was a bad decision to invent atime :-)
We've never turned atime off before and it would be a huge surprise to
me, so I'd avocate that we let the admins who know what they're doing
turn it off. I know many Linux distros install with noatime and/or
nodiratime, but I'm 99% sure tools don't create filesystems with atime
flagged to be off by default (tune2fs -O noatime). 

We don't even do installs on UFS with atime disabled by default in fstab
so why should we so suddenly change course for ZFS?

-my 2c