Re: What tool can I use to make efficient incremental backups?

[Nicolas George <george@nsup.org>]

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