rsync - May 2006 - Problems with link-dest

Hello,
I want to use the link-dest feature. Changed files should not be written again 
but only linked from existing location.

I execute rsync:

florian@horus ~/python $ rsync --relative --recursive -vv
"/home/florian/Desktop/back"
"/home/florian/backupTest/2006-05-07"
building file list ...
done
created directory /home/florian/backupTest/2006-05-07
delta-transmission disabled for local transfer or --whole-file
home
/home/florian/
/home/florian/Desktop/
/home/florian/Desktop/back/
/home/florian/Desktop/back/file1
total: matches=0  hash_hits=0  false_alarms=0 data=4

sent 193 bytes  received 66 bytes  518.00 bytes/sec
total size is 4  speedup is 0.02


and now a second time without changing something at file1:


florian@horus ~/python $ rsync --relative --recursive -vv
--link-dest="/home/florian/backupTest/2006-05-07"
"/home/florian/Desktop/back"
"/home/florian/backupTest/2006-05-07_1"
building file list ...
done
created directory /home/florian/backupTest/2006-05-07_1
delta-transmission disabled for local transfer or --whole-file
home
/home/florian/
/home/florian/Desktop/
/home/florian/Desktop/back/
/home/florian/Desktop/back/file1
total: matches=0  hash_hits=0  false_alarms=0 data=4

sent 194 bytes  received 67 bytes  522.00 bytes/sec
total size is 4  speedup is 0.02


But apparantly now hard link has been created:

florian@horus ~/backupTest/2006-05-07/home/florian/Desktop/back $ ll
insgesamt 4
-rw-r--r-- 1 florian users 4  7. Mai 13:36 file1

florian@horus ~/backupTest/2006-05-07_1/home/florian/Desktop/back $ ll
insgesamt 4
-rw-r--r-- 1 florian users 4  7. Mai 13:37 file1

And when I change one file, the other one stays unchanged.

florian@horus ~/backupTest/2006-05-07_1/home/florian/Desktop/back $ cat
file1
abc
florian@horus ~/backupTest/2006-05-07_1/home/florian/Desktop/back $ echo
"123" > file1
florian@horus ~/backupTest/2006-05-07_1/home/florian/Desktop/back $ cat
file1
123
florian@horus ~/backupTest/2006-05-07_1/home/florian/Desktop/back $ cat
~/backupTest/2006-05-07/home/florian/Desktop/back/file1
abc

What am I doing wrong?

Thanks,

Florian

On Thu, 2006-05-11 at 22:41 +0200, Florian Lindner
wrote:
> florian@horus ~/backupTest/2006-05-07/home/florian/Desktop/back $ ll
> insgesamt 4
> -rw-r--r-- 1 florian users 4  7. Mai 13:36 file1
> 
> florian@horus ~/backupTest/2006-05-07_1/home/florian/Desktop/back $ ll
> insgesamt 4
> -rw-r--r-- 1 florian users 4  7. Mai 13:37 file1
You need to tell rsync to preserve mtimes (--times or -t) for it to
notice that the file hasn't changed.  Otherwise, rsync copies the file
again instead of making a hard link.

Matt

On Thu, May 11, 2006 at 10:41:33PM +0200, Florian Lindner
wrote:
> But apparantly now hard link has been created:
[...]
> -rw-r--r-- 1 florian users 4  7. Mai 13:36 file1
[...]
> -rw-r--r-- 1 florian users 4  7. Mai 13:37 file1
No, those files aren't linked.  Notice the leading "1" in the
hard-link
column which would be a "2" if they were hard-linked to each other. 
The
reason they are not linked together is that you didn't use --times (-t)
in your rsync copy, so they ended up needing different timestamps, and
rsync can only hard-link files that have identical attributes.

..wayne..