Hi there ! Please tell how did you do the migration ? I tried to do this with dsync and performance was far from 'smooth and great'.

2017-09-29 0:54 GMT+05:00 Dave McGuire <mcguire@neurotica.com>:

Hi folks! I converted some of the spools on my mail server from maildir to mdbox. It went smoothly and the performance has been great. However, I have two questions regarding the process.

First, I failed to notice the fairly low default mdbox_rotate_size, and I changed it in dovecot.conf after the migration. Is it possible to somehow make that change retroactive, to coalesce the couple thousand "storage/m.*" files that are anywhere from a few hundred bytes up to a few megabytes, into a smaller number of larger files, without re-doing the migration?

Second, I'd like to delete the old maildir files and directories to reclaim the space in the filesystem, but it's not clear to me which ones I can safely delete, i.e. ones upon which my new mdbox-based spools no longer depend. I know maildir uses new, tmp, and cur directories, but in the spool directory there are also files like dovecot-uidlist, dovecot-uidvalidity, dovecot.index.cache, dovecot.index.log, dovecot.mailbox.log, as well as separate directories for each of my mail folders containing their own new, tmp, and cur directories and their own dovecot* files. Can someone offer some guidance regarding which ones I can safely remove?

        Thanks,
        -Dave

-- Dave McGuire, AK4HZ New Kensington, PA