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

[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?

Thanks, 
Arlin

-----Original Message-----
From: 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
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you want to use many outdated prog versions dont do that a san for storage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]
> Sent: 28 October 2011 17:06
> To: '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
> 
>  
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--
Best Regards

MfG Robert Schetterer

Germany/Munich/Bavaria