Re: unable to open mailbox
On Tuesday 12 January 2010 7:58:30 pm Celejar wrote:
> On Tue, 12 Jan 2010 21:21:54 -0500
>
> Rob Owens <rowens@ptd.net> wrote:
> > On Tue, Jan 12, 2010 at 08:12:05PM -0500, Celejar wrote:
> > > On Tue, 12 Jan 2010 20:05:15 -0500
> > > Rob Owens <rowens@ptd.net> wrote:
> > >
> > > ...
> > >
> > > > Another benefit of maildir is if you use a backup program that does
> > > > file pooling (like BackupPC). Anytime an mbox changes, that's a new
> > > > file to backup (and usually a big one). With maildir, only the new
> > > > messages have to be backed up.
> > >
> > > But note that rsync based backup solutions do differential file backup,
> > > so only the changed / added portion of the mbox has to be copied and
> > > then merged, which mitigates this problem.
> >
> > Yes, rsync will only transfer the changes. But if you are trying to
> > keep a history of backups (the last 7 daily backups, the last 10 weekly
> > backups, etc) then you use much more storage if you have mbox. Each
> > daily backup will hold the complete mbox. Whereas with maildir each
> > daily backup would only require the additional messages to be stored
> > (since the rest of the messages are presumably stored in the previous
> > daily backup).
>
> Fair enough. I actually use MH (and rdiff-backup as well as rsnapshot,
> two rsync based backup solutions).
Since rdiff-backup only stores the reverse diffs, rdiff-backup will use precisely
the same amount of space as if you had used a maildir.
MM
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