Changing the default for ZFS atime to off?
Adam Vande More
amvandemore at gmail.com
Sun Jun 9 02:59:44 UTC 2013
On Sat, Jun 8, 2013 at 4:33 PM, Jeremy Chadwick <jdc at koitsu.org> wrote:
> I **strongly** oppose this change, for one key reason: the classic
> Berkeley UNIX mail spool format (known as "mbox"), which is still
> predominantly used on most UNIX systems today.
>
> Mail clients which read mbox files require a combination of atime and
> mtime to determine if new mail has arrived within the mailbox. If
> mtime > atime, then there's new mail. Not all mail clients support
> alternate methods of detection (for example mutt has check_mbox_size,
> which has had bugs/problems in the past (Google check_mbox_size),
> and is fallible in other ways).
>
> Further points:
>
> - FreeBSD comes with sendmail (MTA/MDA), which supports only mbox
> natively
> - FreeBSD comes with mail/Mail/mailx (client), which only supports
> only mbox natively
> - FreeBSD comes with biff/comsat, as well as from(1), which supports
> only mbox natively
>
Most modern linuce use relatime eg the benefits of noatime and preserving
functionality for mail stuff.
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Power_Management_Guide/Relatime.html
--
Adam Vande More
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