Le decadi 30 thermidor, an CCXXV, Mario Castelán Castro a écrit : > Currently I use rsync to make the backups of my personal data, including > some manually selected important files of system configuration. I keep > old backups to be more safe from the scenario where I have deleted > something important, I make a backup, and I only notice the deletion > afterwards. > > Each backup snapshot is stored in its own directory. There is much > redundancy between subsequent backups. I use the option "--link-dest" to > make hard links and thus save space for files that are *identical* to an > already-existing file in the backup repository. but this is still > inefficient. Any change to a file, even to its metadata (permission, > modification time, etc.), will result in the file being saved at whole, > instead of a delta. > > Can you suggest a more efficient alternative?
We used a similar setup on a server, using the rsnapshot script. But we have users with huge mbox files that were copied entirely each time. We changed for a setup with normal rsync (no --link-dest) and btrfs snapshots, it increased the efficiency (storage and disk bandwidth) dramatically. Regards, -- Nicolas George