On Sun, 2006-03-12 at 06:43, Anne Wilson wrote: > On Sunday 12 March 2006 10:53, Paul Smith wrote: > > On 3/12/06, Anne Wilson <cannewilson@xxxxxxxxxxxxx> wrote: > > > Part one - making a script to create the second generation backup onto > > > diskB - is not a big problem. What is a bigger problem is what to use > > > for the second part. Rsync does not seem to be the right tool for this. > > > I don't want all the older stuff copied back onto the workstation, I just > > > want the new stuff added to the archive. I'm mainly thinking of a photo > > > archive. > > > > Rsync can be configure in order to copy only the new stuff: option -u. > > > Ah, yes. That brings up another question. I had always thought that rsync > was bi-directional - i.e. it synchronises the source and destination so that > they are identical. Then someone said that it doesn't do that at all, it is > uni-directional. It's a long time since I read the man page - I'll do that > today - but any help/guidance/experience would be appreciated. Rsync only copies in one direction at a time. You can use the -u option to only copy newer files, then repeat the other direction to move updates both ways, but it won't get deletions and conflicting updates right. There is a program called unison that uses state files to track changes on each system between runs to resolve the differences. -- Les Mikesell lesmikesell@xxxxxxxxx
