[Dovecot] Questiosn about dbox

[Javier de Miguel Rodríguez]

> The intended way to restore stuff is to either restore the entire dbox to a temp directory, or at least all the important parts of it (indexes + the files that contain the wanted mails) and then use something like:
>
> doveadm import sdbox:/tmp/restoredbox "" savedsince 2011-01-01
>

     Thank you for your response, Timo. That was the answer I was 
looking for. The above example is for sdbox, mdbox should be exactly the 
same, am I right?


>>     - The previous question applies to sdbox and mdbox. In the case of mdbox, we can configure rotation of files using /mdbox_rotate_size/ . We would like to rotate daily, not based in size (our users ask us for yesterday's backup). How can we accomplish this?
> mdbox_rotate_interval = 1d

     Any known issues with mdbox and zlib plugin in lda & imap? I have 
read about mbox is /"read-only"/ with zlib plugin. What about mdbox with 
a high rotate interval (almost a mbox)? How does this work? Is the 
entire mdbox file loaded into ram and decompressed or a temp file in the 
filesystem is used?

     Another question: any hint about the "hot spot" of size for 
/mdbox_rotate_interval/?


>>     We have now 17.000.000 messages in our maildir, almost 1.5 TB (zlib compresssion enabled). Our backup time with bacula is rather bad: 24 hours for a full backup, most of the time the backup is busy fstat'ing all those little messages.
> In case of Maildir there's no point in fstating any mail files. I'd guess it should be possible to patch bacula to not do that.
>
     Good idea. I will write to bacula folks about that.

>> We think that mdbox can help us in this. Does anybody has good experiences migrating from maildir->mdox in "large" enviroments? What about mdox performance&  reliability?
> I haven't recently heard of corruption complaints about mdbox.. Previously when there were those, I didn't hear of complains about losing mails or anything, so that's good :)

     Any additional comments about this? We are seriously thinking about 
migrating to mdbox, but is always scary "to be the first one"

     Thank you for your support

     Regards

     Javier