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Hello,
I have a very busy webserver running apache2 checking /proc/net/ip_conntrack and filtering port 53 i noticed that i have around 50 000 dns query in under 200 second. destinations are by order: - memcache cluster - database - external web services I can't add these in my /etc/hosts file as they're all load balanced and each time our dns responds with a different IP so i'm thinking of caching these with dnsmasq or something similar. Any cons of such an idea? any dnsmasq alternative ? i know on ubuntu there's "dnscache" though there are certain limitations on that front. PS: using dig, i noticed that every query takes around 3 ms to the data centers nameserver. |