We currently just dump the filesystem using Amanda. We have a 21 day
rotation.
In the future, what we would like to do is basically map the concept
of AFS volume to IMAP folders. Specifically, this means that we'd like
to have
a) OldFiles - a read-only view of your mailbox from some time
in the past is available. This should fix the "I just used a
POP client and all my mail in my INBOX is gone" problem.
b) The ability to dump a mailbox (or set of mailboxes) over
the network.
c) The ability to restore a mailbox (or set of mailboxes) over
the network.
With (b) and (c) you should be able to do network backup and move
mailboxes from server to server... and with the aggregator this could
be done live and transparent to any client.
With regards to policy, I believe we're thinking that this will be a
mailbox annotation. The backup system can look at the annotation and
a) never back up the folder
b) back up the folder for disaster recovery only (i.e. no
archive)
c) allow archiving
Walter
