Wasn't there also some issue with cleanup of attachments ? Not being able to delete the last copy, or something. I did some testing of using SIS on a backup dsync destination a year (or two) ago, and got quite confused.. Don't quite remember the problems I had, but I did lose confidence in it and decided having the attachement together with the messages felt safest.
I would also love to hear from admins using it on large scale (100K+ active users). Maybe we should reconsider using it.. -jf On Tue, Apr 30, 2013 at 9:04 AM, Arnaud Abélard < arnaud.abel...@univ-nantes.fr> wrote: > On 04/30/2013 08:05 AM, Angel L. Mateo wrote: > >> El 30/04/13 03:28, Tim Groeneveld escribió: >> >>> >>> Hi Guys, >>> >>> I am wondering about mail deduplication. I am looking into the >>> possibility >>> of seperating out all of the message bodies with multiple parts inside >>> mail >>> that is recived from `dovecot` and hashing them all. >>> >>> The idea is that by hashing all of the parts inside the email, I will be >>> able to ensure that each part of the email will only be saved once. >>> >>> This means that attachments & common parts of the body will only be >>> saved once inside the storage. >>> >>> How achievable would this be with the current state of dovecot? Would it >>> even be worth doing? >>> >>> I asked the same question recently. As Timo responsed at >> http://kevat.dovecot.org/list/**dovecot/2013-March/089072.html<http://kevat.dovecot.org/list/dovecot/2013-March/089072.html>it >> seems >> that this feature is production stable in recent versions of dovecot. >> >> And I think it is worth. My estimations (with just about 10 users >> of my organization, they are no accurate) is that you can save more than >> 30% of total mail storage. >> >> To configure it you need to use options: >> >> * mail_attachment_dir >> * mail_attachement_min_size >> * mail_attachment_fs >> * mail_attachment_hash >> >> Hello, > > Is it just working or is it working in a optimal way? back in October 2011 > we noticed that the deduplication wasn't working as well as we were > expecting as some files weren't properly deduplicated ( > http://markmail.org/message/**ymfdwng7un2mj26z<http://markmail.org/message/ymfdwng7un2mj26z>). > Timo did you ever hit that bug and got it fixed if there was anything to > fix on your side? > > Since we are very interrested in this feature I am very eager to hear > about admins using it on a similar scale (around 80,000 mailboxes). > > Thanks, > > Arnaud > > > > > > -- > Arnaud Abélard (jabber: arnaud.abel...@univ-nantes.fr) > Administrateur Système - Responsable Services Web > Direction des Systèmes d'Informations > Université de Nantes > - > ne pas utiliser: trapem...@univ-nantes.fr >
