Recommendations for backup methods

[Daniel Miller]

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