rsync based on checksum only
ms at citd.de
Thu Jul 5 13:00:27 MDT 2012
On 05.07.2012 09:26, Yan Seiner wrote:
> Is it possible to tell rsync *not* to use file names, date stamps, etc and
> only use the checksum for deciding if a file is the same?
> the remote machine "normalizes" a set of file names to remove all
> punctuation marks and forces all file names to lower case. The files
> themselves are unchanged.
> --checksum looks promising but it does not say anything about file names:
> -c, --checksum Skip based on checksum, not mod-time & size
> Can this be done?
A workaround comes to mind.
MD5/SHA1 (whatever) the files and hardlink them under that name into a
Then when you rsync with "-H" those hardlinks (All files must be below
the start-directory) make sure that rsync only has to delete/create
hardlinks and not copy them again after it had copied it the first time.
I use a similar method for a bunch of big files i have, i hardlink them
into a hidden directory and when i move the files around rsync only
deletes/creates hardlinks. When i move the files onto other storage i
only need to do "find .z -type f -links 1" to find out which files only
have 1 link. Which means all other hardlinks are gone and i can remove
that file. ("find .z -type f -links 1 -delete")
Real Programmers consider "what you see is what you get" to be just as
bad a concept in Text Editors as it is in women. No, the Real Programmer
wants a "you asked for it, you got it" text editor -- complicated,
cryptic, powerful, unforgiving, dangerous.
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