BACKUP STRATEGY
Bacula
BackupPC
Home Dirs Rsync
Mail Dirs Rsync
- FULL backups are done the first Saturday of each month.
- DIFFERENTIAL backups are done every Saturday (except the first one) of each month.
- INCREMENTAL backups are done every day except Saturday.
DIFFERENTIAL backups include all files that have changed since the last FULL backup.
INCREMENTAL backups include all files that have changed since the last backup of any kind.
- FULL backups are done to dedicated tapes that are archived indefinitely. The most recent
tapes are stored in the server room and the rest are stored in a metal cabinet in the
Hebb building.
- DIFFERENTIAL and INCREMENTAL backups are done to the same tapes.
These tapes are re-used after eight (8) weeks.
WHAT THIS MEANS...
- Data is not backed up until sometime after 10:30pm daily so any data saved between
when the last backup finished and the new backup starts will be lost if the system goes down.
- After eight weeks, only the data on the MONTHLY backup tapes is available. No data from
between MONTHLY backups is available.
Since data is only backed up on a daily basis, it is possible to lose email that arrives
and is deleted, removed, changed, lost, etc. before the next backup is performed.
DIRECTORY AND FILE EXCLUDE LISTS
alpha:
BackupPC
Home Dirs Rsync
Mail Dirs Rsync
TAPE BACKUP EQUIPMENT
These backups are all done to the following equipment:
-
StorageTek L20 (with 10 slots) attached to one Adaptec 29160 SCSI controller, sync at 80MB/sec, 68-pin HD LVDS connector Ultrium-230: 200/400Gb, 16MB Buffer, Sustained rate 15 MB/s (54 GB/hr) native, 30 MB/s (108 GB/hr) compressed, Burst rate of xxMB/s, data rate-matching range xxxMB/s
-
HP Ultrium-215 attached to second Adaptec 29160 SCSI controller, sync at 80MB/sec, 68-pin HD LVDS connector Ultrium-215: 100/200Gb, 16MB Buffer, Sustained rate 7.5 MB/s (27 GB/hr) native, 15 MB/s (54 GB/hr) compressed, Burst rate of 80MB/s, data rate-matching range 6-7.5MB/s
For more assistance contact Ron Parachoniak, rap@phas.ubc.ca ( Sysadmin)