North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: [dnsop] DNS Anycast revisited (fwd)
Dean Anderson wrote: On Tue, 3 May 2005, Paul G wrote:i'm terribly sorry, but i'm unable to extract any meaning at all from these statements. when i parse them, they make no sense at all (not in terms of being wrong, just not understandable). could you rephrase them? coherency and consistency are well-defined terms in systems engineering. we are talking about dns queries and hence coherency of zone data (the shared resource). i fail to see how this is open to any interpretation at all. Context helps. In the previous paragraph Vixie said: In other words this is a bad idea:while i'm on the subject, i also remain convinced that using anycast to do distributed load balancing for applications like WWW, on the assumption that the path you heard a dns query on is instructive as to what content would be best to answer with, is silly, and will more often do harm or do nothing than do good. (and i've told akamai and speedera this many times.) ("but it makes for great marketing slideware.") [[email protected] FT]$ dig a248.e.akamai.net @69.45.79.10 ;; ANSWER SECTION: a248.e.akamai.net. 20 IN A 80.67.72.214 a248.e.akamai.net. 20 IN A 80.67.72.201 [email protected]:~$ dig a248.e.akamai.net @69.45.79.10 ;; ANSWER SECTION: a248.e.akamai.net. 20 IN A 69.45.79.15 a248.e.akamai.net. 20 IN A 69.45.79.16 While I'm not a mind reader, It seems he's saying that, since Ultradns doesn't use anycast to do this, it is an example of 'good anycast.'
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