On Fri, Mar 21, 2003 at 05:10:18PM -0800, Peter C. Norton wrote: > On Fri, Mar 21, 2003 at 12:54:55PM -0800, Gordon Messmer wrote: > > That's not correct. "ping mail-test.real.com" ten times and you should > > get about half of the lookups to one box, and half to the other. > > It depends on your proxy nameserver (aka caching nameserver aka > recursive nameserver). I.e. djbdns won't, in a stock unpatched > config, rotate through A records, deeming it an application issue.
But the authoritative (primary/secondary) servers, from which it retrieves the records, *will* rotate them (as long as they're not djbdns too). Once the records expire from the cache, and it retrieves them again, there's a 50/50 chance of getting either X-Y or Y-X. So as long as you have more than a handful of users, and they are not all using the same cache, this will still give statistical load-balancing. Incidentally, another alternative to LVS is to buy a pair of layer 7 switches. May be more reliable in the long term because there's no hard drive. Regards, Brian. ------------------------------------------------------- This SF.net email is sponsored by:Crypto Challenge is now open! Get cracking and register here for some mind boggling fun and the chance of winning an Apple iPod: http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0031en _______________________________________________ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
