Quoting Daniel Miller <dmiller@amfes.com>:

I've been re-thinking my backup strategy - I wanted to see what input others have.  At this time - I'm using sdbox as the primary storage format and running on a single server.

Previously, all my backups were simple filesystem backups. Either inotify-based or cron-based.  The whole mail folder structure would then be copied to a remote storage site.  I've changed services - I now use OpenDrive for the remote storage and can access the remote drive as a mounted folder via WebDAV.  I also now use a cron-based series of restic jobs for the backup processing.

Because I have some large folders - both personal & business letters going back quite some time as well as mailing list archives - some mail folders can be quite sizable.  Now I'm wondering, between sdbox's support for alternate locations and the ability to use different storage formats via namespaces - perhaps I should setup archive folders that are stored differently to improve backup performance.  Maybe maildir or even mbox for the archive folders - I create one per year?

Any comments?  Experiences?

-- Daniel

IMHO, Maildir ontop of zfs.  But anything ontop of zfs will solve it.
zfs Snapshot for local 'backups', zfs send to remote server for real backup.

Rick