[Dovecot] HA Mailbox Design

[Daniel Parthey]

Nikolaos Milas wrote:
> On 10/8/2012 4:47 πμ, Stan Hoeppner wrote:
> 
> >That begs the question,
> >what is your definition of a "Highly Available Mail Server"?  What is it
> >that you actually want to accomplish?  In some detail please.
> 
> 1. Under normal conditions, mail2.example.com is a full mirror of
> mail1.example.com; when any mail message is
> added/viewed/moved/removed etc. to any user's folder or any folder
> is added/viewed/moved/removed etc. at mail1.example.com, we want it
> to be automatically and directly (in real time)
> added/viewed/moved/removed etc. to mail2.example.com too. In other
> words, we need continuous, real-time sync.
> 
> Can I do this and how?

You might have a look at DRBD (distributed replicated block device)
which provides a high available block device with fully synchronous
mirroring:

http://www.drbd.org/home/mirroring

Dovecot can then simply work with the filesystem residing on
the highly avilable DRBD volume.

Regards
Daniel
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