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List:       kdepim-users
Subject:    Re: [kdepim-users] Maildir Backend for Akonadi?
From:       Ingo =?iso-8859-15?q?Kl=F6cker?= <kloecker () kde ! org>
Date:       2011-08-09 21:14:11
Message-ID: 201108092314.12080 () thufir ! ingo-kloecker ! de
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On Tuesday 09 August 2011, Georg Wittenburg wrote:
> Hi again,
> 
> On Tuesday 09 August 2011 17:47:39 Andras Mantia wrote:
> > Georg Wittenburg wrote:
> > >>  No, the cache is right now in the database. Why would you want
> > >>  a second
> > >> 
> > >> cache? With IMAP the cache is synchronized relatively often with
> > >> the server, so you have everything on the server as well.
> > >> 
> > >>  With kmail2 the difference between disconnected is online IMAP
> > >>  is just
> > >>  that
> > >> 
> > >> in disconnected mode not only the headers are downloaded, but
> > >> the mail body as well. The storage is the same (the database
> > >> and the file_db_data
> > >> folder).
> > > 
> > > My local mail cache is part of the data that I include in regular
> > > backups. I prefer all my important data (such the mail contained
> > > in the mail cache) to be in a format that is simple and
> > > straightforward, and will be readable in ten years time. Thus,
> > > I'd prefer to have my local cache in maildir format rather than
> > > the Akonadi DB format.
> > > 
> > > Note that I don't want a second cache, I merely want my main
> > > cache to be in maildir format as it used to be with KMail1.
> > 
> > Unfortunately this is not possible. What you can do is to backup
> > not the database itself, but write a script that backups the mysql
> > database in text format (using sql commands) and the file_db_data
> > directory as well. This will give you a format that is usable in
> > the future as well. I doubt the SQL databases will disappear soon.
> > ;)
> 
> True, but there won't be any nice way to import this data into any
> mail client.
>
> 
> >  The other solution is to make an exporter from akonadi db into
> >  maildir format and ivoke this exporter from your backup script.
> 
> I see. This would add an considerable overhead to my backup procedure
> as converting a non-trivial amount of mail to another format
> undoubtedly takes it's time. Further, I take it that this kind of
> tool does not exist at the moment and the KDEPIM devs don't intend
> to develop one in the near future.

Correct.


> I think -- unless you point out an oversight on my part -- that I'll
> have to switch to another mail client for the time being. KMail has
> served me well for the past ten years or so, and I'd like to thank
> you very much for all the work! And good luck with KMail2/Akonadi!
> :-)

Well, if a maildir-based cache is the most important requirement you 
have then KMail2 is not for you. Good luck with your new mail client! 
;-)

But if all you really need is an easy way to create a local backup of 
your remote IMAP account then maybe OfflineIMAP is what you are looking 
for. "OfflineIMAP traditionally operates by maintaining a hierarchy of 
mail folders in Maildir format locally." [1]


Regards,
Ingo

[1] http://offlineimap.org/

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