[Unbound-users] Performance of Caching Name Servers

蔡述宪 caishuxian at gmail.com
Fri Jun 13 11:34:03 UTC 2008

Hi Ondřej
    Thank you for your advice. Sorry I'll put on the config file later cause
it's not available now. I want to test the performance of Unbound as a
Cached Name Server and I think a CNS will forward any queries that is not
already in its cache,right? So after I disabled the forwarding how can the
CNS resolve the queries? And I also think the same as you that the queries
may fill the uplevel DNS server's cache. What I actually did is to run
resperf several times first(to make a fair condition for both Unbound and
BIND) to fill the underlying uplevel DNS cache and then do the formal test.
And in my formal test I use BIND first and then Unbound, but still BIND
outperforms Unbound...  Your suggestions? Thanks a lot!

On Fri, Jun 13, 2008 at 5:35 PM, Ondřej Surý <ondrej at sury.org> wrote:

> >   And I configured the machine to forward all queries to the up level DNS
> > server.
> You are testing nothing, unless you can control forwarder up level DNS
> cache
> and you flush cache after each test.
> What could have happened is that first run using Unbound filled
> uplevel DNS server
> cache and when you tested Bind it just reused those entries.
> Disable all forwarders and try it again. (And it won't hurt if you
> could put your testing
> config files online and send a link here...)
> Ondrej.
> _______________________________________________
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> Unbound-users at unbound.net
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