Hi all,
any ideas?

Especially point n.1 (no hardlink when sending the same email to multiple addresses) confuse me a bit. Searching in old messages I even stumbled on some users stating that, using Dovecot LMTP server, they achieved what I want (one messagge, multiple hardlinks), but I am _already_ using LMTP with no avail...

Regards.

On 27/06/15 18:18, Gionatan Danti wrote:
Hi all,
I have some questions about hardlinks, alternate storage and
compression. I already scanned the list for related information and I
have an idea of how things works, but I would like to have a definite
answer.

System spec:
- CentOS 6.6 x64
- dovecot-2.0.9-8.el6_6.4.x86_64 RPM package/version
- sdbox mail store

1) About hardlinks: when sending the same message to two different
recipients, I see that the two u.x files are created as two different
files. Diffing them, I see that the only difference is a single char
(see [1] for an example). My questions are:
   a) it is possible to tell dovecot to create a single file + a single
hardlink (linkref=2)? As other IMAP servers support that features (eg:
Cyrus, CommunigatePro, etc) I am wondering if I missed something in
configuring dovecot...
   b) If it is not possible, can I run a script that compare the various
files and substitute equal ones (minus the changing line) with
hardlinks, or it will confuse dovecot? As a side note, why the changing
line ever exists?

2) About alternate storage and compression: actually, I use a single
mail_location without compression. I would like to have an alternate
storage and to enable compression on it only, leaving the main location
without compression. I if understand it correctly, it _should_ be done
using a command similar to "doveadm -Dv -o "plugin/zlib_save=gz" altmove
-uu testuser sentbefore 8d". I'm right thinking that it should work? I
will really end with a primary uncompressed mail store and an alternate,
zlib-compressed one?

Thank you all and sorry if I did some naive questions.

[1]
63c63
< G2fd0811c64be8e553d970000eaa8309f
---
G2ed0811c64be8e553d970000eaa8309f




--
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.da...@assyoma.it - i...@assyoma.it
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