-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The Wednesday 2006-01-18 at 10:48 -0000, Dave Howorth wrote:
On Tue, 2006-01-17 at 20:57 +0100, Carlos E. R. wrote:
Sync will mantain a full copy of everything, at the moment it run; it just saves time by not copying things it already has and have not changed, but the copy will of course contain those unchanged files.
rsync does better than that. It doesn't copy whole files, it copies just the parts that have changed.
I understood it "transmits" the changed parts, but the copy, the file, would be whole.
On the other hand, it 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.
There's a program called dirvish (www.dirvish.org) that can keep multiple copies. You can keep them all completely separate but if you keep them all together it uses hard links so that space is minimised.
Ah, interesting, John Pettigrew mentioned some thing like that the other day.
BTW, for compressed backups, you could perhaps use a compressed filesystem to store the backups.
Such as? I use compressed CDs, but I don't know a compressed R/W file I can use in Linux. - -- Cheers, Carlos Robinson -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Made with pgp4pine 1.76 iD8DBQFDztoXtTMYHG2NR9URAoOqAJwNaLdx3LTUSRvSffQ0JMZPa0yORgCeJnuh CCRQenWdIVNA5ljoaMUedHU= =xNer -----END PGP SIGNATURE-----