[Dovecot] How can we horizontally scale Dovecot across multiple servers?

[Felipe Scarel]

There is, though not readily available unfortunately. Thanks for the input,
always helpful.

On Mon, Oct 31, 2011 at 10:33, Robert Schetterer <robert at schetterer.org>wrote:

> Am 31.10.2011 12:28, schrieb Felipe Scarel:
> > Quick question about the usage of DRBD: I'm thinking of a setup on my
> > organization here (15k+ users, 4TB of email data), but I'm holding back
> > on the clusterization due to the high volume of data.
> >
> > Using DRBD would implicate mirroring those 4TB of data across all
> > cluster nodes? If yes, I might go with a SAN-based solution, though I
> > haven't studied much about that setup yet (the other sysadm
> > administrates the VMs and SAN, gotta ask him a few questions).
>
> i wouldnt do that with drbd
> as such big setup , there should be enough money using better choices
> >
> > On Mon, Oct 31, 2011 at 08:00, Robert Schetterer <robert at schetterer.org
> > <mailto:robert at schetterer.org>> wrote:
> >
> >     Am 31.10.2011 10:43, schrieb Arlin:
> >     > Hi Robert,
> >     >
> >     > Thanks for the reply. We are upgrading Dovecot to v2.0.15 and other
> >     > component's to the latest version. In that case, can we use san
> >     for storage
> >     > or are you recommending that drbd with ocfs2 is the best way to
> >     attain the
> >     > horizontal scalability for the mail storage?
> >
> >     Hi Arlin, there is no best way, you should choose
> >     whatever fits best to your needs an haves
> >     so it depends on many stuff ( i.e at last finance, network, manpower,
> >     knowledge) etc
> >
> >     So all i can say iam just using a loadbalanced cluster setup with
> drbd
> >     ocfs2 maildir dovecot postfix mysql clamav spamassassin on ubuntu
> lucid
> >     lts with 3000 Mailboxes without any big Problems yet
> >     but i can imagine that a professional SAN might be better in
> performance
> >     but there is a lot other other questions left , i.e maildir must not
> be
> >     the best solution for mailbox format etc
> >
> >     cluster setups with lots of mailboxes are complex
> >     in many ways, if you planning a real big mailservice
> >     you should ask more here on this list for existing other setups and
> >     choose i.e
> >     Timo and/or others for professional and paid advice and work
> >
> >
> >     >
> >     > Thanks,
> >     > Arlin
> >     >
> >     > -----Original Message-----
> >     > From: dovecot-bounces at dovecot.org
> >     <mailto:dovecot-bounces at dovecot.org>
> >     [mailto:dovecot-bounces at dovecot.org
> >     <mailto:dovecot-bounces at dovecot.org>] On
> >     > Behalf Of Robert Schetterer
> >     > Sent: 31 October 2011 14:26
> >     > To: dovecot at dovecot.org <mailto:dovecot at dovecot.org>
> >     > Subject: Re: [Dovecot] How can we horizontally scale Dovecot
> >     across multiple
> >     > servers?
> >     >
> >     > Am 31.10.2011 09:47, schrieb Arlin:
> >     >> Could anyone please respond to this query. Thank you!
> >     >
> >     > you may use loadbalancers i.e (keepalived etc) and/or
> >     >
> >     > http://wiki2.dovecot.org/FeatLoginProxy
> >     > http://wiki2.dovecot.org/PasswordDatabase/ExtraFields/Proxy
> >     >
> >     > look the list for cluster setups etc
> >     >
> >     > reading your former post
> >     > you want to use many outdated prog versions dont do that a san for
> >     storage
> >     > might be a good choice some of the list use drbd with ocfs2 and
> other
> >     > cluster filesystems
> >     >
> >     >>
> >     >>
> >     >>
> >     >> From: Arlin [mailto:arlin at mvs.us <mailto:arlin at mvs.us>]
> >     >> Sent: 28 October 2011 17:06
> >     >> To: 'dovecot at dovecot.org <mailto:dovecot at dovecot.org>'
> >     >> Subject: How can we horizontally scale Dovecot across multiple
> >     servers?
> >     >>
> >     >>
> >     >>
> >     >> Hi,
> >     >>
> >     >>
> >     >>
> >     >> How can we horizontally scale Dovecot across multiple servers? Do
> we
> >     >> require to install independent instances of Dovecot on each
> server?
> >     >>
> >     >>
> >     >>
> >     >> We are planning to use a NAS/SAN device using ZFS or EFS for email
> >     > storage.
> >     >> Each logical unit will be of 10TB and similarly as the no: of user
> >     >> increases we are planning to add multiple 10TB units.
> >     >>
> >     >> In this case how we can manage the email storage on multiple
> volumes
> >     >> from Dovecot.
> >     >>
> >     >>
> >     >>
> >     >> The configuration of our existing system is:-
> >     >>
> >     >>
> >     >>
> >     >> Dovecot 1.0.15 / Maildirs
> >     >>
> >     >> Postfix 2.5.5
> >     >>
> >     >> Debian 5.0.9 (Lenny)
> >     >>
> >     >> MySQL 5.0.15
> >     >>
> >     >>
> >     >>
> >     >> Please advise.
> >     >>
> >     >>
> >     >>
> >     >> Thanks in advance.
> >     >>
> >     >>
> >     >>
> >     >> Creative Regards,
> >     >>
> >     >> Arlin
> >     >>
> >     >>
> >     >>
> >     >>
> >     >>
> >     >>
> >     >>
> >     >>
> >     >>
> >     >>
> >     >>
> >     >>
> >     >
> >     >
> >     > --
> >     > Best Regards
> >     >
> >     > MfG Robert Schetterer
> >     >
> >     > Germany/Munich/Bavaria
> >     >
> >
> >
> >     --
> >     Best Regards
> >
> >     MfG Robert Schetterer
> >
> >     Germany/Munich/Bavaria
> >
> >
>
>
> --
> Best Regards
>
> MfG Robert Schetterer
>
> Germany/Munich/Bavaria
>