[Dovecot] dovecot & OCFS2 Cluster

[Timo Sirainen]

On Mon, 2011-04-25 at 19:02 +0200, Osvaldo Alvarez Pozo wrote:
> hi all
> 
> We have an ocfs2 cluster compose of 4 Debian lenny serveurs wich have
> access to an ISCSI LUN we have create a partition on this Lun and
> formated this partition as OCFS2.
> 2 serveurs does mail delivery (SMTP) and the two other are pop/imap
> servers. The smtp servers use dovecot LDA to deliver to mailboxes. La
> version de dovecot is 1.2.13, ldirectord balance conexion to the
> servers(pop/pops/imap/imaps to the two imap/pop serveurs) (smtp to the
> two smtp servers).

With v2.0 I'd suggest using http://wiki2.dovecot.org/Director

> mail_location = maildir:/var/vmail/%d/%u/Maildir

Cluster filesystems don't seem to like Maildir much. With v2.0 you could
use mdbox.

> We are having severals  problems from "cpu stuck for 61 seconds"   to
> "too many connexion".

I don't know what either of those errors mean. In any case you should
switch to high-performance login processes:
http://wiki.dovecot.org/LoginProcess

http://wiki.dovecot.org/PerformanceTuning has more stuff