On Tue, 2 May 2006, James Harper wrote:
. Allows very frequent incremental backups (hourly, depending on the servers ability to cope with the extra load)
Do you really want to dump those incrementals to tape or just generate a differental?
. Ability to restore to any given backup point, eg I spent the whole morning working on a document, and then either (a) accidently deleted it, or (b) the fileserver was sucked into a wormhole). There are filesystem based solutions to (a), but not to (b).
Actually, there are many solutions to B, mostly involving geographically dispersed disks (Ive worked on several systems with replicated disk arrays separated by distances ranging from 2km (fire redundancy) to 10,000km (just about anything I can think of bar an asteroid strike))
. Depending on the implementation, the ability to aggregate the last full backup with subsequent incremental backups to write a current 'virtual full' backup to tape.
Bacula doesn't have that ability (but it's in Linux EVMS...)
. Alternatively to the above, the ability to write the full backup and the incremental backups to tape to give you the 'restore to any backup point' facility and keep the storage offline.
This has been discussed recently. Bacula can't do it (yet) as it doesn't have deletion tracking.
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