> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Michael Scheidell > Sent: Sunday, 4 September 2005 12:13 a.m. > To: [email protected] > Subject: RE: [AMaViS-user] > Postfix+Amavisd+Spamassassin+Clamav low performance on > 14-host deployment > > > From me: > > > Use local caching-only DNS server on each host. > > > > On a second though, perhaps not. > > One or two nearby lightly loaded hosts providing a caching > > DNS server could probably deal better with 14 client hosts, > > than running dns server on each heavily loaded host with only > > 3% idle time. > > Especially in a load balanced situation where it is likely > that all the > hosts are looking up all the same domains for 'dictionary attack runs'
I still think that the majority of DNS requests will be answered by the local (caching) DNS server. Besides, DNS requests going out on the NIC are more expensive then those going on the loopback interface. >From my experience in the real world (YMMV, of course), locally installed DNS server offers more benefits than remote one (remote on the local network, of course). If would be maybe worth doing a performance benchmark to see which setup behaves better. Anyway, that's not the cause why the OP has long delays (something else is failing). Cheers, Bojan ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ AMaViS-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/amavis-user AMaViS-FAQ:http://www.amavis.org/amavis-faq.php3 AMaViS-HowTos:http://www.amavis.org/howto/
