[Borgbackup] Syncing directories with Borgbackup

[Bzzzz]

On Thu, 7 Nov 2019 11:08:40 -0600
Joseph Hesse <joehesse at gmail.com> wrote:

> I have done a successful borg backup of my home directory on PC1.  I 
> want to use this backup to synchronize (like rsync) my home directory
> on PC1 to the home directory on PC2.
> 
> I plan to do this by using "borg mount" on PC2 to mount my latest
> backup from PC1 to /tmp, on PC2, and then manually copy (cp -a -r -u)
> the home directory in /tmp to  /home.
> 
> My question is: Is this the best way to do this?

No, you should write scripts triggered by a crontab to automatize all
that.

On each of my machine, I've got /BORG on which is NFS mounted the
machine's repo just before a new backup is performed
and /SSHFS where I can mount a specific borg backup.

You could go on with the same, then measure the time taken for each
action (add 33-50% for security), and create crontabs as follow:

PC1:
* borg create /home /BORG

* wait until avg time taken to backup+NN% is reached

PC2:
* borg mount backsrv::PC1/home_date (last backup) on
  /SSHFS
  * rsync from /SSHFS to /home OR cp -au /SSHFS/* /home

Side effect of scripting: you do not care about databases (especially
them, because all of them can't be faithfully binary-backup when running)
because your scripts: check if a DB is running, if so, stop it,
perform backup|restore, restart DB engine is it was running formerly.

Jean-Yves