I post this with no comment whatsoever (as an owner of a DAT-DDS3 drive and a believer in dump)

http://berdmann.dyndns.org/zwicky/testdump.doc.html


Elliot Peele wrote:


You might also want to look at rdiff-backup. It uses librsync to do its
backups. Looks to be pretty good.

Elliot

On Thu, Feb 20, 2003 at 07:37:59PM -0500, Mike M wrote:


On Thursday 20 February 2003 17:13, Jeremy Portzer wrote:


On Thu, 2003-02-20 at 17:05, Jason Tower wrote:


as long as it's only a couple of gigs, and it's only moving across the
lan, i wouldn't bother with tar/incremental backups unless space on the
backup server is really tight. using the rsync method that jeremy linked
to earlier is probably the best bet, or just copy the files directly if
you're really lazy like me. make a seperate directory for each day of
the week and use a cron job to copy data to the appropriate directory on
the appropriate day. that way if you need to restore a file from three
days ago you can do it in about three seconds. if you have the space for
it save the friday directories and rotate them so you always have three
or four, that way you can go back a month or so if necessary.


Just to make sure people noticed -- that "rsback" script that I
mentioned (based on the rsync article) does this exact thing -- takes
snapshots for each day, allowing you to access previous versions. The
nice thing is that it uses hard links for files that haven't changed, so
a lot of space is saved. And since rsync is used, files that haven't
changed aren't copied, saving time and network bandwidth. It's really
very easy to set up. I'm testing this on the TriLUG backup server now.


Thanks. It's another productive day at TriLUG.


For even more space savings, look into "rdiff-backup" which only stores
deltas (differences) between files, but it does require a special
utility to recover the files.


I'm usually hyperventilating by the time I realize I need a backup. I think I'll pay the cost of increased storage room.. The rsync feature of copying only what's changed should work out very well.
--
Mike M.
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