On Wed May 29 2019 02:00:24 GMT-0400 (Eastern Standard Time), Aki Tuomi via dovecot dovecot@dovecot.org wrote:
On 29.5.2019 8.17, @lbutlr via dovecot wrote:
Are you sure you read it? https://wiki2.dovecot.org/MailboxFormat/dbox seems pretty clear.
David, in particular, is there some question you feel that the wiki fails to answer?
I'm not David, but I just read the entire page and one thing that I was specifically interested in has to do with the importance of the index files.
I seem to recall reading somewhere that dovecot saves more than one version of the index files to reduce the chance of losing the indexes, but I don't see anything about that.
Also - is it possible to configure dovecot to keep multiple copies?
I was also planning on putting the indexes on either a ZFS or BTRFS partition to further reduce the chance of data loss (self-healing preventing silent data corruption, and snapshots), but only saw a comment that they can be stored in a different location, but nothing about why you might want to do that - e.g., to use a more resilient filesystem to store these critical files.
Another aspect I'd like to see is recommendations for backup strategies, with respect to the fact that the indexes are so critical.