-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The Wednesday 2007-04-25 at 20:22 +0100, G.T.Smith wrote:
A good backup program should do all this automatically.
I theory good, in practice not.. well look at editor example originally quoted ... modification time does not always mean content has changed it merely means the modification time stamp has changed... it would be nice that everyone handled this time stamping issue in a well defined manner... in practice many people don't, this is not criticism this is just an observation BTW
The things is, if the modification time is the same, the file data will still be the same and doesn't need to be backed up again. On the other hand, if it has changed, there is a doubt: either check a checksum and decide, or backup regardless. If the change time has changed, I understand that only the metadata should be saved - provided the previous test decided the data was the same.
Yes a good backup program will do this ..... but the serious players would charge me more than the underlying hardware is worth! A couple of people have pointed me to some stuff on a separate sub-thread which I intend to look at.. and hopefully I can avoid having to write my own solution...
Well, rsync does this kind of decissions, I think. And the sugested rdiff-backup improves on it keeping old versions too. The dissadvantage is that it doesn't compress data. As to backup to DVD, there is "dar" and "kdar". Plus "par", that I still haven't evaluated. And there are some other solutions in the distro, I think. - -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Made with pgp4pine 1.76 iD8DBQFGMJIqtTMYHG2NR9URAtz2AJ4ub5J9vRyxA2BlcAtFJ3v7ySNOZgCfbFvM Z1BLnwJq5lOomKCFR+Nr9GY= =5lbW -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org