Hi
ah, ok, i see the gmysql query definition for any, maybe the skip-cname
documentation should
be updated in http://doc.powerdns.com/dns-to-query.html where it says
"In reality, each query
for a question tuple first involves checking for a CNAME"
Hi David,
On Jan 4, 2012, at 12:31 , David Saez wrote:
Hi
so, for every request, powerdns does not a CNAME databse lookup and then a A
database
lookup if it did notr find the CNAME record, right ?
if this is true and your zones contain more A records than CNAME records , then
most of
the CNAME databse lookups are useless (and take valuable resources), for those
cases
it's possible to save those lookups by:
a) first do the A lookup and the then CNAME lookup
or
b) allow hostnames in the A record and when found return a CNAME
For every request, PowerDNS does an ANY database lookup. If there's a CNAME in
there, it follows the chain; if there's an A in there, it's done. There are
only extra queries *if* the first ANY lookup yields a CNAME. So, PowerDNS
already does something better than suggestion (a).
Kind regards,
Peter van Dijk
Netherlabs
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