dovecot - Nov 2015 - Questions about hardlinks, alternate storage and compression]

> centos 7.x is latest, so if you need help upgrade make a bug report to
> centos, not waste your time here since you choiced a precompiled
> problem, reporting here 7s helpfull if you use dovecot compiled with
> the latest version here, this migth be a unknown bug you then have
> found, but not if you use precompiled problems, then report to the
> maintainers of such software
Hi,
does it means that when you use before_sieve and after_sieve in your 
dovecot configuration the hard-linking part works?

I don't need help to upgrade to CentOS 7.x, but before going this route 
I would understand if this is how dovecot/pigenhole are expected to work 
(don't use hardlinks) or if I misconfigured something.

RedHat / CentOS are a very common base OS, so I wonder if I am the only 
one hitting this problem or no.
Thanks.

-- 
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti at assyoma.it - info at assyoma.it
GPG public key ID: FF5F32A8

Hi all,
I have some updates on the hard-link discussion.

First, let me explain that I installed a test machine with CentOS 7.1 
and dovecot/pigeonhole version 2.2.10-4 and the results where identical 
on what I had on CentOS 6.7 and dovecot 2.0.9-19

The bottom line is that hardlinking works only when no, or at most only 
one, RCPT have sieve filtering. For example:
- if no RCPT has sieve filters, hardlink is OK
- if only one RCPT has sieve filters, hardlink is OK
- if two or more RCPTs have sieve filters, hardlink is NOT working.

Some time ago I reported that, when disabling the sieve_before and 
sieve_after options, hardlinks worked; however, this really was a side 
effect of what written above.

So, let me do a straigth question: is someone using dovecot/LMTP with 
hardlinking? To me, this seems a _very_ important feature, and I wonder 
if I am doing something wrong or if the feature (hardlink+sieve) simply 
does not exists.

Thanks.

On 27/11/2015 09:44, Gionatan Danti wrote:
>> centos 7.x is latest, so if you need help upgrade make a bug report to
>> centos, not waste your time here since you choiced a precompiled
>> problem, reporting here 7s helpfull if you use dovecot compiled with
>> the latest version here, this migth be a unknown bug you then have
>> found, but not if you use precompiled problems, then report to the
>> maintainers of such software
>
> Hi,
> does it means that when you use before_sieve and after_sieve in your
> dovecot configuration the hard-linking part works?
>
> I don't need help to upgrade to CentOS 7.x, but before going this route
> I would understand if this is how dovecot/pigenhole are expected to work
> (don't use hardlinks) or if I misconfigured something.
>
> RedHat / CentOS are a very common base OS, so I wonder if I am the only
> one hitting this problem or no.
> Thanks.
>
-- 
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti at assyoma.it - info at assyoma.it
GPG public key ID: FF5F32A8

On 30 Nov 2015, at 10:21, Gionatan Danti <g.danti at assyoma.it>
wrote:
> 
> So, let me do a straigth question: is someone using dovecot/LMTP with
hardlinking? To me, this seems a _very_ important feature, and I wonder if I am
doing something wrong or if the feature (hardlink+sieve) simply does not exists.
Hardlink+Sieve has never worked. The fix is a bit complicated. Here's my
TODO entry about it:

 - remove mail_deliver_session after all, do all the stuff transparently
   by hooking into mailbox_copy().
     - use this hook also to do the mail deduplication: 1) sort all destination
       users, 2) create mail_user only once for each user, 3) remember in
       src_mail the previously copied mail, 4) use that for mailbox_copy()ing
       to following recipients
     - make sure this removes duplicate dbox mails when sieve saves mail to
       multiple mailboxes