Re: Recommended DNS server for a medium 20-30k users isp

[Steinar Haug via NANOG <nanog () lists nanog org>]

> > Do you have any recommendations for recursive DNS servers for a medium
> > sized (20-30k users) ISP.
> > We have used powerdns and unbound but sometimes find the caching times
> > a bit on upper side. Any suggestions between these two or anything
> > new?
> I've been happy with PowerDNS Recursor.  What sort of latency were you
> seeing in it and at what loading?

I wonder if we're trying to answer the wrong question. "sometimes find
the caching times a bit on upper side" could certainly be interpreted
to refer to caching according to the TTL specified for the zone on the
*authoritative* server.

If so - it's possible that the user simply needs to be able to specify
a maximum TTL, independent of the setting on the authoritative server.

Steinar Haug, AS2116
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