[Pdns-users] Upgrading from 2.9

[Peter van Dijk]

Hello Daniel,

On May 4, 2012, at 20:11 , Daniel L. Miller wrote:

> The release notes indicate upgrading to 3.x from 2.9 presents, among other items, a potential for a significant performance change - not necessarily an increase or decrease.  At 3.1, has this been clarified at all?  Again, the release notes make reference to possible tuning changes to restore possibly lost performance - has a set of reasonably reliable defaults been established?
> 
> I've got a small domain, serving both our LAN and Internet services.  Nothing demanding - I just want to continue to minimize overhead while maximizing performance.

In practice we are mostly hearing reports of awesome performance. Those 2.9->3.0 notes were written with relatively little operational experience with 3.0 in large deployments. Since then, many big companies have put 3.0, 3.1-RC* and everything between it to the test and there is nothing to be worried about.

As for defaults, the defaults that PowerDNS ships with (see pdns.conf-dist or pdns_server --no-config --config) appear to be reasonable for most small to medium sized setups. For larger setups, increasing cache sizes, TTLs and backend counts may make sense.

Kind regards,
-- 
Peter van Dijk
Netherlabs Computer Consulting BV - http://www.netherlabs.nl/