[Pdns-users] Upgrading from 2.9

Peter van Dijk peter.van.dijk at netherlabs.nl
Fri May 4 20:17:16 UTC 2012

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/

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