I've also wondered the same thing with restore times. Maybe we should
give it a test?. I know backing up my virtual machine images (around
30GB single file) takes a LONG time to make the diff. a couple of hours.
But it isn't running on a super machine. That essentially is the same as
a database - big file with many small changes. But I would assume that
applying a diff would be much much quicker than generating one because
we aren't comparing a whole file, we are just adding bits and removing
bits in certain sections.
When restoring, does rdiff-backup apply all the diffs at once? does it
apply them in-place? or does it generate a new file for every version
and then apply the next diff until it gets to the desired version?.
Ryan
Dominic wrote:
Michael Biebl wrote:
2.) If one of the rdiffs goes corrupt (e.g. via a bad sector), all my
older backups are broken.
mmm, true I think, you should use raid or (better IMHO) a secondary
backup
(use rsync).
Is there a reason why you recommend rsync for that? If I understood
the project description correctly, rdiff-backup should work just fine
for remote backups.
The reason I use rsync for the secondary backup is that I just want a
mirror of the data on the first (rdiff-backup) backup machine -
including (and especially) all the rdiff-backup archives. Doing an
rdiff-backup of an rdiff-backup archive would seem too much of a good
thing. Or maybe I just can't get my head around it.
Dominic
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