Re: cross-platform backup tool incremental rdiff-backup takes long

[Robert Nichols]

On 10/18/22 1:37 AM, Jonas Schöpf wrote:
> I deleted a lot of stuff on my machine (around 200GB) and if I do a new backup 
> I have to abort it after 9 hours as it does not finish.
>
> iostat -x -m 3 shows that %util is always between 70 and 95.
> So I assume that IO is again a bottleneck, but shouldn't it be easy for 
> rdiff-backup to just delete the files from the backup?
> Is there a way how I can speed up this process?

Deleting a file is not a simple operation. Since rdiff-backup always works 
backward from the current mirror, restoring a file as of some previous date 
requires storing a snapshot of the last known state of that file in the 
increments. By default, those snapshots are compressed except for file names 
that match the --no-compression-regexp (see Globals.py for the default 
expression), and that compression can take a lot of time.

You might want to take a look at the "--no-compression" option in the manpage.

--
Bob Nichols     "NOSPAM" is really part of my email address.
                Do NOT delete it.