[Pdns-users] Changes between versions

[Yves Goergen]

Hello,

I'm preparing a server upgrade from Ubuntu 14.04 to 16.04 and would like 
to know what has changed between the packaged versions.

I found out that I'm going to upgrade PowerDNS Server (pdns-server) from 
version 3.3.1 to 4.0.0 alpha 2 and Recursor (pdns-recursor) from 3.5.3 
to 4.0.0 alpha 2 as well.

Can somebody tell me what the notable changes between these versions 
are? I only found very detailed lists of almost every touched line of 
source code, most of which I don't understand. I'm looking for added or 
removed features, incompatible changes and necessary configuration 
updates (especially for MySQL backends).

Also, is it true that Ubuntu has packaged an alpha version into their 
LTS distribution? Isn't it that alpha versions are highly unstable, not 
much tested, have lots of known bugs and should never be used in 
production systems? Or does PowerDNS have another definition of that term?

Yves
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