Mailboxes are in Maildir format. Any good backup tips? Had success with version control?

Jiri Bourek bourek at
Tue Jul 1 12:06:06 UTC 2014

On 1.7.2014 13:45, Leonardo Rodrigues wrote:
> Em 01/07/14 00:16, Charles Cazabon escreveu:
>> deoren <Dovecot-mailing-list at> wrote:
>>> Right now I'm using LVM snapshots + tarballs for daily backups, but
>>> I'd like to get better coverage for incremental changes that occur
>>> throughout the day. The size of existing content is low, but (small)
>>> changes are frequent.
>> If you actually want to preserve those increments (as opposed to just
>> keeping
>> an rsync mirror up-to-date), I like rdiff-backup.  It handles maildirs
>> well
>> because of the one-message-per-file design.
>      Some may agree with me, some may disagree. But for my Maildir
> backups, i usually exclude the files "dovecot.index*".
>      On the most common situations, you'll need to restore just one or
> other mailbox, so rebuilding those indexes wont kill the server. And by
> excluding these, i could save 10-15% of backup space on some cases with
> virtually no disadvantage.
>      And on a worst case scenario, where i would need to restore the
> whole server and mailboxes, things will already be screwed, so knowing
> that dovecot would be harder on I/O for rebuilding the indexes will be
> just another problem :)

That really depends, rebuilding indexes can increase your downtime for 
hours, so it may be better to pay a bit for extra storage space instead 
of not being paid at all by your customers.

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