[Dovecot] Dovecot tuning for GFS2

[林 宏河]

Andrea,

We tried to use GFS2 + Dovecot(mdbox) but when there's many mailboxes and
mails,
it seem to get slow while dropping mail to the mailbox.
We tested with LeftHand storage by the way. So we switched to NFSv4.

Also, keep in mind that director those not detect when the backend server
fails.
So, we use poolmon as suggested in director wiki.
We've tested and it seems to work fine.

Have a look at it.

Kouga
> -----Original Message-----
> From: dovecot-bounces at dovecot.org [mailto:dovecot-bounces at dovecot.org] On
> Behalf Of Andrea gabellini - SC
> Sent: Wednesday, August 21, 2013 9:19 PM
> To: dovecot at dovecot.org
> Subject: Re: [Dovecot] Dovecot tuning for GFS2
> 
> Robert,
> 
> So you are using the same config I'm testing. I forgot to write that I
> use maildir.
> 
> the final design will be, as RedHat suggest, that the same user goes
> always on the same node (using proxy or director).
> 
> Thanks,
> Andrea
> 
> 
> 
> Il 21/08/2013 14:04, Robert Schetterer ha scritto:
> > Am 21.08.2013 13:57, schrieb Andrea gabellini - SC:
> >> Hello,
> >>
> >> I'm deploing a new email cluster using Dovecot over GFS2. Actually I'm
> >> using courier over GFS.
> >>
> >> Actually I'm testing Dovecot with these parameters:
> >>
> >> mmap_disable = yes
> >> mail_fsync = always
> >> mail_nfs_storage = yes
> >> mail_nfs_index = yes
> >> lock_method = fcntl
> >>
> >> Are they correct?
> >>
> >> RedHat GFS support mmap, so is it better to enable it or leave it
disabled?
> >> The documentation suggest the use of flock. What about it?
> >>
> >> Thanks,
> >> Andrea
> >>
> >>
> >>
> > i have
> >
> > mail_fsync = always
> > mail_nfs_storage = yes
> > mail_nfs_index = yes
> > mmap_disable = yes
> >
> > with ocfs2/maildir
> >
> > howeveryou you use a cluster filesystem ,if you use loadbalancing
> > additional you should use it
> > with
> >
> > http://wiki2.dovecot.org/Director
> >
> > by the way i never tested GFS2 with dovecot myself, but others
> > told me it doesnt work very fine....
> >
> >
> > Best Regards
> > MfG Robert Schetterer
> >
> 
> --
> ----------------------------------------------------------------
> All men are idiots... I married their king.
> ----------------------------------------------------------------
> 
> Ing. *Andrea Gabellini*
> Email: andrea.gabellini at telecomitalia.sm
> <mailto:Andrea%20Gabellini%20%3Candrea.gabellini at telecomitalia.sm%3E>
> Skype: andreagabellini
> Tel: (+378) 0549 886111
> Fax: (+378) 0549 886188
> 
> Telecom Italia San Marino S.p.A.
> Strada degli Angariari, 3
> 47891 Rovereta
> Republic of San Marino
> 
> http://www.telecomitalia.sm