On Fri, Sep 11, 2020 at 06:17:14AM -0500, Fross, Michael wrote:
>
> > I run incremental backups of all the important data one my system,
> > in particular I run hourly incremental backups of my 'home' directory
> > (I use Linux) and this contains just about everything of significance.
> >
[snip details]
> >
> What backup software did you decide to use Chris? I’ve written some scripts
> to backup my Gnucash files, but have been looking at a more comprehensive
> solution.
>
Both the 'local' hourly backup and the remote (to the garage) daily
one basically use rsync with linux 'hard links' to provide the
incremental backup. There's a 'prebackup' and a 'postbackup' script
that do the directory manipulation and to weed out some of the backups
as they get older. The scripts are written in Python but are only a
few tens of lines long. All d-i-y.
So, for example, the hourly 'local' backup is:-
#!/bin/bash
#
#
# Local snapshots to the /bak disk drive
#
#
#
# Run the pre-backup script
#
/home/chris/.cfg/esprimo/bin/prebak.py
#
#
# Backup files using rsync
#
rsync -a --exclude-from /etc/rsync.doNotCopy \
--link-dest=/bak/snapshot/cur /etc /home /bak/snapshot/new/
#
#
# Run the post-backup script
#
/home/chris/.cfg/esprimo/bin/postbak.py
If you're interested (or anyone else is) we can go 'off list' to
discuss further, I'm quite happy for others to use my code.
The big advantage of the rsync 'hard-links' is that the backups are
all 'complete' copies of what's backed up, you don't have to unpack
anything or run a program. You can find what looks exactly like your
home directory (and /etc as you can see) in the backup, except that
it's how it was x hours or y days ago.
It works because a file that doesn't change only exists in one place
and the files you see in each hourly/daily/weekly backup are [hard]
links to the same file, so it only uses space for one copy of the file.
--
Chris Green
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