--detect-renamed question

Matt McCutchen hashproduct+rsync at gmail.com
Fri Oct 12 16:55:51 GMT 2007

On 10/11/07, radius13a at mac.com <radius13a at mac.com> wrote:
> I've started testing the detect-renamed patch with 2.6.9 and soon 3.0.0pre1.  I have an unique situation where I'm rsync'ing to a HSM based filesystem.  I've found that the detect-renamed patch works but it appears to do a copy of the file to the new destination.  This is particular slow since the file in the HSM based filesystem may only be a stub and all the data is only resident on tape.  The copy waits for the datq to be recalled from tape which depending on the file size can take a long time.  I've looked through the patch code and am wondering if there is an easy way to have rsync do a move from the ~.tmp. directory.

This is easy to do, and I have implemented a --trust-detect-renamed
option to do it in the attached patch to the current CVS rsync.
However, it is risky because a false rename detection could cause
rsync to substitute an unrelated but similar-looking destination file
for a new source file.  Don't use the option unless you are prepared
for the consequences.

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