[Dovecot] New mailbox format

[Brian Bartholomew]

> I don't think PostgreSQL or MySQL had support for these kind of
> clusters yet?

I don't run mysql clusters myself, however:

http://www.mysql.com/products/database/cluster

MySQL Cluster enables you to:

    * Cost-effectively deliver 5 nines availability using parallel
      server architecture with no single point of failure.

    * Deliver the performance and high throughput required to meet the
      most demanding enterprise applications.

    * Incrementally scale your applications in a linear fashion as
      your needs grow without having to invest in expensive hardware.

							Brian