[Dovecot] Questions about single intance storage

[Yann Dupont]

Le 05/12/2011 02:45, Timo Sirainen a écrit :
> On 5.12.2011, at 3.03, Stan Hoeppner wrote:
>
>> To cope with catastrophic failure, create a "special" Dovecot
>> administrator only mailbox (real/virtual/whatever) that "contains" all
>> of the SiS files, a special Dovecot index.
>
> I'm not thinking about a catastrophe. For that a regular full filesystem backup+restore would work mostly okay (a snapshot would be perfect, without snapshot some extra work would be needed). The problem is that people want to recover only one specific user's mails from some older backup, because they accidentally deleted the mails.. This needs to be somewhat easy to implement with SIS, but it isn't.
>
>

Other problem I'm thinking of, because I'd like to use SIS on our 
production servers ; but right now I think I can't .

We have lots of users (+5000 teachers/engineers) on our first setup, 
+70000 students on our 2nd setup.

The user base is on LDAP, and move on a daily basis. When a user leave 
the university, he has right to use mailbox for a certain time and then 
we close the account.

Right now, we archive and then delete the mailbox directories (we don't 
use special dovecot mecanism : we migrated from another system not long 
time ago and we had special scripts for that).

If we use SIS, what happen to the attachements ? The usage count will 
never go to 0, and the attachements will stay there forever.

In that situation, I think we have no means to correct the attachement 
usage count ?

-- 
Yann Dupont - Service IRTS, DSI Université de Nantes
Tel : 02.53.48.49.20 - Mail/Jabber : Yann.Dupont at univ-nantes.fr