The synthetic full keeps track of moved and deleted files that occur between incrementals. When the incrementals are assembled, the changes are reflected in the new synthetic full. I just tested this to see for myself. (ver 6.5)
I believe this feature is enabled (and required) in the policy under the label "collect true image restore information" and "with move detection". I moved a subdirectory to a new directory level, and the incremental backed up the entire contents of that moved data. It isn't smart enough to see that the files were same just moved to a new home. Maybe de-duplication will handle this in future versions. -Jon > You need to run a differential and then a synthetic full immediately > following. The synthetic basically takes your last full and applies all > the differentials to it to create a new "full" image. > > Full + Diff + Diff + Diff = Synthetic Full > Synthetic Full + Diff + Diff + Diff = Synthetic Full > Synthetic Full + Diff + Diff + Diff = Synthetic Full > etc... > > The "Synthetic Full" is a normal full image backup according to > Netbackup and gets used in the next Synthetic Backup. I think there are > issues with this related to deleted files (differential backups don't > realize that something got deleted so the new full will have all the > deleted files) so I would recommend "refreshing" the synthetic with an > actual full every so often. > > > -Jonathan > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of dbergen > Sent: Tuesday, February 19, 2008 2:20 PM > To: VERITAS-BU@mailman.eng.auburn.edu > Subject: [Veritas-bu] Question about synthetic backups > > > When I attempt a synthetic backup and the most recent backup of the > client is a full backup nothing happens. > > Nothing happens because Netbackup says there was no incremental backup > to analyze. My question is: So What? > > I want another full backup, to a completely different volume pool, > shouldn't Netbackup realize that the volume pool is different and run > the synthetic backup again? > > Hopefully someone can tell me what I am doing wrong here. > > Thanks, > dbergen > > +---------------------------------------------------------------------- > |This was sent by [EMAIL PROTECTED] via Backup Central. > |Forward SPAM to [EMAIL PROTECTED] > +---------------------------------------------------------------------- > > > _______________________________________________ > Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu > > _______________________________________________ > Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu > > _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu