Skip based on checksum not worked as expected when using with complex filter rules.

[Kevin Korb]

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So, I am assuming that without --itemize-changes you couldn't tell the
difference between "I am transferring a file" and "I am fixing the
timestamp on a file".

Even if I am right, you are probably still mis-using --checksum.  When
you use --checksum you force a checksumming of absolutely everything
on both ends before anything else happens.  Without --checksum a file
with a wrong timestamp will be delta-xferred.  A delta-xfer is at
worst the same as a both side checksum.  If you let it delta-xfer
files with wrong timestamps that is much faster than --checksum since
- --checksum wastes time checksumming files that can't possibly have a
checksum match.

Simply put, if you use --checksum without one of --itemize-changes,
- --link-dest, or --write-batch you are doing something horribly wrong.


On 04/17/2015 11:34 PM, Hongyi Zhao wrote:
> On Fri, 17 Apr 2015 21:27:56 -0400, Kevin Korb wrote:
> 
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>> Any time rsync wants to do something to a file you don't think it
>> should be see what --itemize-changes says about it.  In fact, -v
>> is almost entirely useless without --itemize-changes.  In fact,
>> if I was in charge I would make -v include --itemize-changes.
> 
> Thanks a lot for your hints.
> 
> Based on your hints, I use the `-cniv' options combinations and do
> the extract as follows on the output of rsync:
> 
> awk '/^>fc/'
> 
> And it does the trick.
> 
> Regards
> 

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