[Dovecot] database failover

[Timo Sirainen]

On 10.12.2011, at 12.07, Nick Edwards wrote:

> Trying to get dovecot to _only_ use local copy of database, only querying
> another database server (same database, just replicated) if local copy is
> not responding, I have google fu'd a bit and found my only answer in so far
> as dovecot did this once upon as time, but it was only due to a dovecot
> bug, that has since been fixed, is that so?
> The wiki shows no information of failover, just load sharing, or is it an
> undocumented feature, or can dovecot not do failover, if not, can it be
> made so?
> 
> Trying to cut down on network traffic, postfix does this nicely, I thought
> dovecot did too.

You could add two passdbs + userdbs with different configs. The second dbs would be used when first db is down, but also for unknown users / wrong authentications.

But yeah, the load balancing should be optional. There are just so many other things to do as well..