Backup tape rotation

Now that we (will) have a tape backup system, we need to make a tape rotation system.

Data to back up

 * Home directories: Currently 200GB
 * Mail: Currently 17GB
 * Server backups: Probably ~100-200GB for full images of our servers

Tape rotation goals
Before we can come up with a rotation scheme, we need to figure out what we want in terms of backups (off-site in the IMSS tape vault and sitting in tapes in the server closet)


 * The tape vault will contain a full backup (every 3 months), incremental monthly backups, bi-weekly mail backups, and 3-month server backups

Home directories

 * Nightly AFS backup volumes


 * Full backup every 3 months (into vault)
 * Monthly
 * Weekly
 * Monthly incremental (into vault)


 * Keep every year forever

Mail spools

 * Get backed up with home directories
 * Bi-weekly into vault

Servers

 * Monthly onto tape