rsync - Dec 2011 - --compare-dest apparently incompatible with --checksum or --size-only

I am working with rsync on Debian, package version 3.0.9-1.



I am trying to use rsync --compare-dest to make a delta-copy of a directory.

In my case, the mtimes are all unreliable.  The data is the same, but 
the times are all messed up and always will be.

I am trying to use --compare-dest with --checksum or --size-only and it 
does not work.  All files are transferred and the delta copy output is 
the same size as the local compared directory.

I would rather not use --size-only for obvious reasons (eh, 1, 0, what's 
the difference?)

Example:

rsync -v -a --checksum --compare-dest=/original /modified delta-backup



I could use fdupes to build a list instead, but it would be nice if 
rsync would would.

Please correct me, document if this is true, or fix it.

Other ideas?



-- 
# Jesse Molina
# Mail = jesse at opendreams.net
# Page = page-jesse at opendreams.net
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If you use -a then rsync will fix the time stamps if they are
different.  Therefore rsync will have to copy them to fix the time
stamps.  If you don't care about timestamps then don't tell rsync to
sync them.

Your source and target are both local paths.  That means that rsync is
running with --whole-file forced.  It will not do a delta transfer
anyways.

On 12/24/11 22:21, Jesse Molina wrote:
> 
> I am working with rsync on Debian, package version 3.0.9-1.
> 
> 
> 
> I am trying to use rsync --compare-dest to make a delta-copy of a 
> directory.
> 
> In my case, the mtimes are all unreliable.  The data is the same,
> but the times are all messed up and always will be.
> 
> I am trying to use --compare-dest with --checksum or --size-only
> and it does not work.  All files are transferred and the delta copy
> output is the same size as the local compared directory.
> 
> I would rather not use --size-only for obvious reasons (eh, 1, 0,
> what's the difference?)
> 
> Example:
> 
> rsync -v -a --checksum --compare-dest=/original /modified
> delta-backup
> 
> 
> 
> I could use fdupes to build a list instead, but it would be nice
> if rsync would would.
> 
> Please correct me, document if this is true, or fix it.
> 
> Other ideas?
> 
> 
> 
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