We have an array of 8 load balanced linux boxes running Spamassassin with peak traffic upto 20k mails per hour per server.
How do I make optimum use of DNS caching. Currently I am using bind as caching DNS server on each machine. Would it be better I have a central DNS server. That way the DNS Cache hit will increase dramatically , but could also bog the DNS server down with too many requests. Also which is the best caching nameserver I can use on linux Thanks Ram
