[Dovecot] HA Mailbox Design

[Stan Hoeppner]

On 8/11/2012 11:52 AM, Daniel Parthey wrote:
> 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.

But to be clear, for a true HA setup with full active/active nodes, this
must be a cluster filesystem (GFS2/OCFS2).

-- 
Stan