Mailinglist Archive: opensuse (933 mails)

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Re: [opensuse] openSUSE on SSD?
  • From: Patrick Shanahan <paka@xxxxxxxxxxxx>
  • Date: Fri, 4 Jun 2010 11:53:13 -0400
  • Message-id: <20100604155313.GG21195@xxxxxxxxxxxxxxx>
* Greg Freemyer <greg.freemyer@xxxxxxxxx> [06-04-10 11:38]:

noatime is what breaks a mutt install with default config because it
depends on atime being updated when a email is read.

Totally unrelated to noatime, the atime issue highlights that lots of
tools break Mutt's assumption that atime newer than mtime means a file
has been read.

But that broken assumption is a legacy problem the Mutt appears to
have always had and it seems there are non-default config options that
allow Mutt to quit using atime as a key flagging field. As yet I
haven't seen any discussion of the work-around.


from: http://wiki.mutt.org/?MuttFaq/Folder

<quote>
Why are "new" flags of mbox folders wrong in folder-list view?

As written in manual.txt, the flags are determined by comparing the
timestamps of last access and modification. This can get messed up if the
folders are "touched" by other programs than mutt, like "biff" or backup
software.

There is also some issue with the "noatime" flag for mounting filesystems
(most often used on laptops). If "noatime" is activated, no timestamp is
updated for the last folder access, i.e. Mutt cannot determine if the
folder has received new mail since last visited. For mutt before version
1.5.15, you can recompile it with the --enable-buffy-size option to
"configure"; for mutt 1.5.15 or later see the $check_mbox_size option.
Mutt will then use the folder size instead of the access times. (This is
only a workaround and might give suboptimal results; another option is to
use the MaildirFormat.)
</quote>


and from:
http://www.linuxfoundation.org/news-media/blogs/browse/2009/03/ssd%E2%80%99s-journaling-and-noatimerelatime

<quote>
Personally, I don’t think relatime is worth it. There are other ways of
working around the issue with mutt — for example, you can use
Maildir-style mailboxes, or you can use mutt’s check_mbox_size option. If
the goal is to reduce unnecessary disk writes, I would mount my file
systems using noatime, and use other workarounds as necessary.
Alternatively, you can use chattr +A to set the noatime flag on all files
and directories where you don’t want noatime semantics, and then clear
the flag for the Unix mbox files where you care about the atime updates.
Since the noatime flag is inherited by default, you can get this
behaviour by setting running chattr +A /mntpt right after the filesystem
is first created and mounted; all files and directories created in that
file system will have the noatime file inherited.
</quote>

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