dovecot - Oct 2011 - Attachements with SIS : shauld all the same files share the same inode ?

Hello. I configured SIS , and all seems to work well, but I noticed 
something strange :

For exemple, this attachement :

6e/2d# ls -al 6e2df299* | sort -n

104 instance of -rw------- 104 vmail vmail 346584 16 oct.  17:47 
6e2df299fa96daec9b4735d07c494046429be4d6-ffd0d1xxxx

The files are hardlinked, so it seems ok, but I also see 9 others files 
in the same directory :


-rw-------   1 vmail vmail 346584 16 oct.  17:47 
6e2df299fa96daec9b4735d07c494046429be4d6-0519df2a94fc9a4e1f4100008a6b99b6
-rw-------   1 vmail vmail 346584 16 oct.  17:47 
6e2df299fa96daec9b4735d07c494046429be4d6-1790b92994fc9a4e1a4100008a6b99b6

as you can see, same prefix, If I compare them with diff, they are all 
the same files.

ls -i  show that 104 have the same inode, as expected, and the 9 
remaining files have different inodes.

I expected all the files share the same inodes. Is there something wrong 
here ?

My setup is debian squeeze + auto packages from
http://xi.rename-it.nl/debian/

dovecot is  2:2.0.15-0~auto+21

thanks,
-- 
Yann Dupont - Service IRTS, DSI Universit? de Nantes
Tel : 02.53.48.49.20 - Mail/Jabber : Yann.Dupont at univ-nantes.fr

On Mon, 2011-10-17 at 09:19 +0200, Yann Dupont wrote:
> 104 instance of -rw------- 104 vmail vmail 346584 16 oct.  17:47 
> 6e2df299fa96daec9b4735d07c494046429be4d6-ffd0d1xxxx
> 
> The files are hardlinked, so it seems ok, but I also see 9 others files 
> in the same directory :
> 
> 
> -rw-------   1 vmail vmail 346584 16 oct.  17:47 
> 6e2df299fa96daec9b4735d07c494046429be4d6-0519df2a94fc9a4e1f4100008a6b99b6
> -rw-------   1 vmail vmail 346584 16 oct.  17:47 
> 6e2df299fa96daec9b4735d07c494046429be4d6-1790b92994fc9a4e1a4100008a6b99b6
> 
> as you can see, same prefix, If I compare them with diff, they are all 
> the same files.
I guess you have "mail_attachment_fs = sis posix" (default)? Sounds
like
there could be a bug where SIS does comparison of files but for some
reason thinks they are different.

You could try if you can merge them with:

mkdir /tmp/queue
touch /tmp/queue/6e2df299fa96daec9b4735d07c494046429be4d6-foo
doveadm sis deduplicate /var/attachments /tmp/queue