Is there a howto/tutorial on backups/rsync that covers the use of hard and soft links?
josephj at main.nc.us
Tue Jan 22 15:58:55 MST 2013
Thank you! I will read it and see where to go from there.
On 01/22/2013 12:44 PM, Kevin Korb wrote:
> Here is one I wrote up for a LUG presentation that is specifically
> about doing it yourself:
> On 01/22/13 02:31, Joe wrote:
> > There have been a lot of posts on the list lately about issues with
> > hard links. It has been very interesting, but I don't understand
> > it very thoroughly. I haven't used hard links for anything yet.
> > I've used symlinks - not for backups, of course - and have seen
> > them get broken or deleted in backups.
> > Is there a tutorial anywhere that will explain how this works
> > (assuming that the reader understands the basic concepts of backups
> > and knows how to program, but doesn't really understand how to use
> > links to create things like incremental or differential backups)?
> > It seems like there are a lot of fine points to consider, some of
> > which can really bite you if you don't take them into account.
> > I'm working on my own personal backup system using bash and rsync.
> > When it's done it will be pretty good, but it would be *much*
> > better if I rewrote it to have more backup versions using hard
> > links to save space.
> > I am writing my own because (aside from learning a lot) I have only
> > seen two types of backup utilities - those that are very simplistic
> > and won't let me do what I want and those which are enterprise
> > level and I can't figure out how to get them to do anything without
> > extensive study. (I did experiment with areca (I think it uses
> > rsync libraries under the hood) which would probably do everything
> > I want, but I got stuck too many times and couldn't get enough
> > support on their forum to keep going.)
> > TIA Joe
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