jos houtman schrieb:
[..snip..]
> Do you have any idea's/hints? maybe options i have not seen, even when
> they sound silly. They might trigger a fresh idea :D

reading through all the other answers has been quite interesting.
Though, as you mentioned silly ideas ;-) here's mine:

Apart from if it's stable enough to use in a production environment but
just as such an idea you wanted:

What about setting up something with overlayfs, unionfs or any other
translucent filesystem? The scenario would be like:

- About to start backup now.
- add an overlay mount for data directory
  * every change/add from now on will be written on a separate directory
/ partition / whatever but transparently visible while accessing the
"real" data directory
- back up the overlay partition from latest backup run
- merge this overlay into "real storage path" and destroy the mount
- keep the current overlay active till next backup and repeat this procedure

Christian

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