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Re: rsync to NAS for backup

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On Thu, Feb 18, 2021 at 06:59:03PM +0200, Teemu Likonen wrote:
> * 2021-02-18 11:13:25-0500, Gary Dale wrote:
> 
> > rsync is a quick & dirty backup tactic but it's got limitations.
> >
> > 1) files may stay around forever in the backup even if you've deleted 
> > them from your main computer because you don't need them.
> >
> > 2) you only have one copy of a file and that only lasts until the next 
> > rsync. This limits your ability to restore from a backup before it is 
> > overwritten.
> 
> > rsync is not a good substitute for backups.

No, it's not. It is a fantastic tool for backups :-)

> Rsync is great backup program with "--link-dest" option. Here is the
> idea in simplified code:

[...]

Absolutely. Time travel!

Actually, I've implemented this at a customer's place. They were
delighted.

Where rsync shows some weaknesses is on big, fat files (think
videos, one or several GB).

Really huge directories (tens to hundreds of TB) were once a
challenge, too, but I hear that they refined the scanning
part in the meantime. No direct experience, though.

And, oh, Gary: if you want to delete files which disappeared
in the source, check out the --delete option.

But this time-staggered backup with --link-dest is really great.

Cheers
-- t

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Thread

rsync to NAS for backup mick crane <mick.crane@gmail.com> - 2021-02-13 10:30 +0100
  Re: rsync to NAS for backup didier gaumet <didier.gaumet@gmail.com> - 2021-02-13 14:00 +0100
    Re: rsync to NAS for backup Toni Mas Soler <antomassol@protonmail.com> - 2021-02-13 14:00 +0100
  Re: rsync to NAS for backup Charles Curley <charlescurley@charlescurley.com> - 2021-02-13 14:20 +0100
  Re: rsync to NAS for backup David Christensen <dpchrist@holgerdanske.com> - 2021-02-13 20:30 +0100
    Re: rsync to NAS for backup Gary Dale <gary@extremeground.com> - 2021-02-18 17:20 +0100
      Re: rsync to NAS for backup Teemu Likonen <tlikonen@iki.fi> - 2021-02-18 18:10 +0100
        Re: rsync to NAS for backup <tomas@tuxteam.de> - 2021-02-18 18:30 +0100
          Re: rsync to NAS for backup Charles Curley <charlescurley@charlescurley.com> - 2021-02-19 01:10 +0100
            Re: rsync to NAS for backup <tomas@tuxteam.de> - 2021-02-19 10:00 +0100
        Re: rsync to NAS for backup <tomas@tuxteam.de> - 2021-02-18 18:30 +0100
          Re: rsync to NAS for backup Gary Dale <gary@extremeground.com> - 2021-02-18 20:10 +0100
        Re: rsync to NAS for backup Andrei POPESCU <andreimpopescu@gmail.com> - 2021-02-18 18:30 +0100
    Re: rsync to NAS for backup Mirko Parthey <mirko.parthey@web.de> - 2021-02-19 16:30 +0100

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