I wonder why you need DNs caching inside openser. Usually you will a resolving name server near (in terms of network hops) to your SIP proxy.
E.g. I have a bind9 running on the same linux box as openser. This name server will be used by all processes running on this linux box (/etc/resolv.conf points to 127.0.0.1 and to another name server in my server farm). Bind will cache all requests. A request for a domain which is cached in bind will usually be <1ms and during waiting for the DNS response openser wont cause CPU load - and probably the caching implementation in bind is a good one. Thus for me I do not see any reason for having the caching inside the SIP proxy. regards klaus On Mon, February 12, 2007 20:22, Christian Schlatter said: > Now that OpenSER supports NAPTR/SRV lookups I'd like to add DNS caching > to our SIP servers in order to decrease call setup delays and DNS server > load introduced by DNS queries. > > I was wondering if others on this list have experience with running > OpenSER together with a DNS cache solution like nscd or dnsmasq. Initial > tests with nscd were not successful since somehow the OpenSER processes > do not go through the ncsd caching, whereas e.g. ping does. I'm also not > sure if ncsd or dnsmasq do support NAPTR and SRV type DNS queries. > > I'd be glad to hear any recommendations on this topic, > > Christian > > _______________________________________________ > Users mailing list > [email protected] > http://openser.org/cgi-bin/mailman/listinfo/users > _______________________________________________ Users mailing list [email protected] http://openser.org/cgi-bin/mailman/listinfo/users
