[Unbound-users] Configuration suggestions?
sveniu at opera.com
Mon Apr 15 08:35:46 UTC 2013
On 04/13/2013 11:43 AM, Anders Lindborg wrote:
> We have used PowerDNS a while ago and it was quite speedy
Same here, and while it performs nicely, two things kept cropping up:
* In rare cases, cache entries never expired and were kept around
forever, meaning that it kept responding with the old data way after
TTL expiry. It was pretty much impossible to debug, and ended up
being a dealbreaker, unfortunately.
* Upon start/restart, the load of new requests to a clean cache would
cause it to somehow fail a lot of queries (queue full?) and return
SERVFAIL. This response would be cached for quite a while (60s?),
and cause it to serve SERVFAIL to even the most popular queries like
facebook, google and youtube. It can be resolved with a slowstart
mechanism in the loadbalancer, though.
As for performance itself, have you observed any significant and/or
reproducible differences between PowerDNS and Unbound?
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