dovecot - Jul 2010 - Problem with hard links in lda - please help

Hello,

I'm trying to enable hardlinks for messages sent to mutiple users. (I need
this because I have mailing lists with 5000 users used many times a day).

I've read that, to do this, I have to write a script that uses the
/usr/local/libexec/dovecot/deliver
command in this way:
deliver -p <FILE> -d <USER1> -d <USER2>

Of course, I enabled the "socket listen" option in the configuration
file
to get the command line work, and set the
maildir_copy_with_hardlinks = yes

The deliver command works, so I have the messages correctly in the
"new"
directory in the maildir folder.

But if I list the files, they have the "links" number = 1, so I see
that
the file was copied, not hardlinked!

I see in the page
http://wiki.dovecot.org/LDA
that is possible, in fact it says

Parameters
[...]
-p <path>: Path to the mail to be delivered instead of reading from stdin.
If using maildir the file is hard linked to the destination if possible.
This allows a single mail to be delivered to multiple users using hard
links, but currently it also prevents deliver from updating cache file so
it shouldn't be used unless really necessary. (v1.1+)

Of course, I use a version 1.1+ (1.2.12).

Please help, thanks in advance

Fabio Ferrari

On Fri, 2010-07-16 at 15:44 +0200, Fabio Ferrari wrote:
> I'm trying to enable hardlinks for messages sent to mutiple users. (I
need
> this because I have mailing lists with 5000 users used many times a day).
> 
> I've read that, to do this, I have to write a script that uses the
> /usr/local/libexec/dovecot/deliver
> command in this way:
> deliver -p <FILE> -d <USER1> -d <USER2>
You can't give more than -d parameter. deliver can deliver a mail only
to a single user at a time.

The important part is that your MTA calls a script (that you need to
create) that gets multiple users as parameters, and then you can call
deliver -p for each one of them separately. I don't think MTA can call
the delivery script with 5000 parameters, so there must be some
duplication always.

Also mailing lists often send separate mails to users. If this is
happening, hard linking can't be done because the mails are different.

Ok it works now! Thank you very much for your help!

Fabio Ferrari
> On 23.7.2010, at 11.22, Fabio Ferrari wrote:
>
>> But now the
>> deliver -p FILE -d USER
>> crashes, giving me a very bad segmentation fault.
>
> Often it happens if you have a something=no setting as the first setting
> in config file. This triggers a glibc bug and crashes it. Move the setting
> down.
>
>