Re: [rdiff-backup-users] rdiff-backup detects that many files has changed - cifs mount

[Robert Nichols]

On 07/30/2012 02:38 AM, Attila Strba wrote:
> Hi Guys,
>
> Some more info. I have checked the following files:
> file_statistics.2012-07-27T04_00_16+02_00.data
> file_statistics.2012-07-28T04_00_16+02_00.data
> file_statistics.2012-07-29T04_00_16+02_00.data
> file_statistics.2012-07-30T04_00_16+02_00.data
>
> There are two strange things:
> Various files, have a flag changed and an increment of size (though I am
> confident they haven't changed recently.
>
> Example:
> # Filename Changed SourceSize MirrorSize IncrementSize
> Tmp/ProcessExplorer/Eula.txt 1 7005 7005 140
>
> What is also strange that files that keep changing, in some backup session stops
> changing:
> file_statistics.2012-07-27T04_00_16+02_00.data
> Fachwissen/Digitale_Signalverarbeitung/TheEngineersGuideToDSP/CH20.PDF 0 244431
> 244431 NA
> file_statistics.2012-07-30T04_00_16+02_00.data
> Fachwissen/Digitale_Signalverarbeitung/TheEngineersGuideToDSP/CH20.PDF 1 244431
> 244431 184
>
> error_log.data, mirror_metadata.data, increments.dir have a size of 0.
>
> I also took a diff of
> mirror_metadata.2012-07-26T14%3A07%3A12+02%3A00.snapshot.gz
> mirror_metadata.2012-07-30T04%3A00%3A16+02%3A00.snapshot.gz
>
> of the text file
> Tmp/ProcessExplorer/Eula.txt
> The changes are totaly the same, I see 9 bytes hex change at the beginning of
> the file:
> 72 73 02 36 46 00 1B 5D 00
>
> Similary in other files these bytes are the same, but there are also more bytes
> that are indicated as increments.
>
> I am missing extended_attributes, access_control_lists. Do I have to turn these
> on somehow special?

The "1" flag in file_statistics is just the result of rdiff-backup thinking that
something changed.  The small IncrementSize is the size of the "compressed"
(larger than the original, actually) string that indicates "no change".  The
extended_attributes and access_control_lists files will only be present if
the file system being backed up actually uses those features.

I had a thought.  In the manpage for rdiff-backup, see if the paragraph for
the "--no-compare-inode" option might explain what is happening.

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