Hi all,
I've used rdiff-backup in the past for backing up my home directories to a friend's server over ADSL. This works pretty well because rdiff-backup only ever sends the changes. I can delete all but the last 30 (or whatever) days of backups and it still always only sends increments.
I've recently started trying to use duplicity as I wanted my backups to be encrypted so that users on the remote server can't see my data. I thought duplicity "builds on rdiff-backup and adds encryption" but I don't think it works the same. As far as I can see, if I want to delete backups older than say 30 days in duplicity I need to have a full backup newer than 30 days. This means at least once every 30 days I need to transmit all the data to the remote end. This takes me over 24 hours on ADSL. Does anyone know if I've got this wrong? Any other suggestions for backups that are *always* bandwidth efficient after the first full and are encrypted?
JD
P.S. I'm also going to ask on the duplicity list but I thought someone here might know.