-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The Tuesday 2006-01-17 at 23:08 -0000, John Pettigrew wrote:
In a previous message, "Carlos E. R." wrote:
On the other hand, [rsync] is not an historic backup, you can not retrieve older versions. There is just one copy of everything - unless you program it to keep several copies, in diferent places.
The nifty thing about this backup script I found is that it uses rsync initially, and then uses cp -al to copy only links to those files (i.e. it uses no extra space unless files have changed), giving a reverse incremental backup - the latest version is complete (thanks to rsync) and the daily and weekly backups before it contain only the changes to that most-current backup.
Ah! I didn't notice that. Interesting :-) I would like a rsync thing that made compressed copies. I just saw tonight something similar in "mkzftree", used to create compressed trees for zisofs/RockRidge cd/dvd backups: -C path, --crib-path path Steal ("crib") files from another directory if it looks (based on name, size, type and modification time) like they match entries in the new filesystem. The "crib tree" is usually the compressed version of an older version of the same workload; this thus allows for "incremental rebuilds" of a compressed filesystem tree. The files are hardlinked from the crib tree to the output tree, so if it is desirable to keep the link count correct the crib path should be deleted before running mkisofs. The crib tree must be on the same filesystem as the output tree. Now, I'll have to translate that to human parlance to understand it... sigh. I'll call it a day. - -- Cheers, Carlos Robinson -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Made with pgp4pine 1.76 iD8DBQFDzZcBtTMYHG2NR9URAknGAJ9wxhmmVmCZq319VvdU0zOSTYhw/gCglX7M kSXCamsRpClS+HMExE5MCLk= =haz9 -----END PGP SIGNATURE-----