Date: Sun, 9 Jun 2013 04:14:18 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Adam Vande More" <amvandemore@gmail.com>, "Jeremy Chadwick" <jdc@koitsu.org> Cc: fs@freebsd.org Subject: Re: Changing the default for ZFS atime to off? Message-ID: <8C34552BD7074953A74E0443BAD1CCB7@multiplay.co.uk> References: <16FEF774EE8E4100AD2CAEC65276A49D@multiplay.co.uk> <20130608213331.GB18201@icarus.home.lan> <CA%2BtpaK0QH51tpaOvK9H6-O86-CiuhCUrsiyXeA7OrGW3rwAfTw@mail.gmail.com>
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----- Original Message ----- From: "Adam Vande More" <amvandemore@gmail.com> To: "Jeremy Chadwick" <jdc@koitsu.org> Cc: "Steven Hartland" <smh@freebsd.org>; <fs@freebsd.org> Sent: Sunday, June 09, 2013 3:59 AM Subject: Re: Changing the default for ZFS atime to off? > On Sat, Jun 8, 2013 at 4:33 PM, Jeremy Chadwick <jdc@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 Now thats a clever idea, like it. Regards Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.
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