[BBLISA] Definition of dump levels?

[John Stoffel]

I want to chime in here and say that first off, people don't care
about backups.  At all.

They only care when it comes to restores.  So you need to optmize
restores to work the way you expect.  If you do a backup at time A,
then when you restore the data, you want the state to come back as
close to state A as possible.

The problem (issue) with dump/tar/cpio, esp once you starting doing
mixed backups with a mix of backups, then you have a major problem at
restore time, since tar/dump/cpio doesn't *DELETE* files which were
backed up at level 0, then deleted (or renamed) from subsequent
backups.

So when you do a recover, those files all come back again, not just
the files at the time of restore.

Think about this carefully, it's a bit subtle, but obvious.  And it's
a real problem.

Cheers,
John