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What tool can I use to make efficient incremental backups?

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Hello.

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?

I know about bup <https://github.com/bup/bup> but I have not used it
because it warns that “This is a very early version. Therefore it will
most probably not work for you, but we don't know why. It is also
missing some probably-critical features.”.

I also know about obnam. Unfortunately, the main author it has been
announced that it will be unmaintained because it has become a piece of
engineering, with all the ugly consequences of that, and real
engineering is “not fun” for him.

Thanks.

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What tool can I use to make efficient incremental backups? Mario Castelán Castro <marioxcc.MT@yandex.com> - 2017-08-17 18:50 +0200
  Re: What tool can I use to make efficient incremental backups? Fungi4All <fungilife@protonmail.com> - 2017-08-17 19:20 +0200
    Re: What tool can I use to make efficient incremental backups? Mario Castelán Castro <marioxcc.MT@yandex.com> - 2017-08-17 19:40 +0200
  Re: What tool can I use to make efficient incremental backups? Nicolas George <george@nsup.org> - 2017-08-17 20:10 +0200
    Re: What tool can I use to make efficient incremental backups? Mario Castelán Castro <marioxcc.MT@yandex.com> - 2017-08-17 20:30 +0200
      Re: What tool can I use to make efficient incremental backups? Nicolas George <george@nsup.org> - 2017-08-17 20:50 +0200
        Re: What tool can I use to make efficient incremental backups? Mario Castelán Castro <marioxcc.MT@yandex.com> - 2017-08-17 22:30 +0200
          Re: What tool can I use to make efficient incremental backups? <tomas@tuxteam.de> - 2017-08-17 23:00 +0200
            Re: What tool can I use to make efficient incremental backups? Mario Castelán Castro <marioxcc.MT@yandex.com> - 2017-08-18 02:40 +0200
              Debian-user conventions [was: [...] incremental backups?] <tomas@tuxteam.de> - 2017-08-18 09:40 +0200
  Re: What tool can I use to make efficient incremental backups? Liam O'Toole <liam.p.otoole@gmail.com> - 2017-08-19 01:10 +0200
    Re: What tool can I use to make efficient incremental backups? Mario Castelán Castro <marioxcc.MT@yandex.com> - 2017-08-19 17:10 +0200
  Re: What tool can I use to make efficient incremental backups? Celejar <celejar@gmail.com> - 2017-08-20 05:10 +0200
    Re: What tool can I use to make efficient incremental backups? Gene Heskett <gheskett@shentel.net> - 2017-08-20 08:10 +0200
      Re: What tool can I use to make efficient incremental backups? Glenn English <ghe2001@gmail.com> - 2017-08-20 21:40 +0200
        Re: What tool can I use to make efficient incremental backups? Mario Castelán Castro <marioxcc.MT@yandex.com> - 2017-08-21 02:00 +0200
      Re: What tool can I use to make efficient incremental backups? Celejar <celejar@gmail.com> - 2017-08-22 05:50 +0200
        Re: What tool can I use to make efficient incremental backups? Gene Heskett <gheskett@shentel.net> - 2017-08-22 07:30 +0200
          Re: What tool can I use to make efficient incremental backups? Celejar <celejar@gmail.com> - 2017-08-22 15:20 +0200
    Re: What tool can I use to make efficient incremental backups? Mario Castelán Castro <marioxcc.MT@yandex.com> - 2017-08-21 03:10 +0200
      Re: What tool can I use to make efficient incremental backups? Celejar <celejar@gmail.com> - 2017-09-17 03:40 +0200
      Re: What tool can I use to make efficient incremental backups? Kushal Kumaran <kushal@locationd.net> - 2017-09-17 20:40 +0200

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