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