Re: cross-platform backup tool Same files from different source dir causes spurious diff files

[ewl+rdiffbackup]

Hi,

On 09/02/2022 21:46, Mr. Clif wrote:
> It would be great if rdiff-backup would allow offsets like this or even 
> better the ability to specify a range like
> 100000-165535:0-65535
> Or you could just have the starting UID after the colon.
>
> In the man page under USERS AND GROUPS, it says:
> "If you specify both --preserve-numerical-ids and one of the mapping 
> options, the behavior is undefined."
>
> I think it would be better to allow both with the user-mapping-file 
> overriding the preserve-numerical-ids behavior when necessary. As in my 
> use case I never want user name mapping.

The user mapping file is only used to save the files on disk, it isn't 
used in the metadata so it wouldn't help in your case.
Anyway, we already have an enhancement record in this regard: 
https://github.com/rdiff-backup/rdiff-backup/issues/621

I'm personally not sure that it's a good idea: a backup is there to save 
things alike, not to modify them, so it's a dangerous road IMHO.

KR, Eric