Slashdot: Providers Ignoring DNS TTL?

Sat Apr 23 03:21:52 UTC 2005

On Wed, 20 Apr 2005 Valdis.Kletnieks at vt.edu wrote:

> On Wed, 20 Apr 2005 14:00:00 EDT, Dean Anderson said:
> > On Wed, 20 Apr 2005 sthaug at nethelp.no wrote:
> > > Where do you see any connection between anycast and ignoring DNS TTL?
> > The data he showed isn't necessarilly "ignoring ttl".  If there are
> > multiple anycasted caching servers behind a specific IP address, then
> > those several cache's will each have a different state.  Since, [as I
> > explained, and was supposed by the poster], there is "some kind of load
> > balancing going on", and also since implementors of anycast caches have
> > posted questions and explained their purposes [which could be seen as
> > "load balancing"], this is a likely explanation.  It may not be the only
> > explanation: e.g. they could be restarting their nameservers every thirty
> > seconds. But "anycast loadbalancing" of a caching server is probably the
> > most likely.
> 
> All fine and good.  But nowhere in your long paragraph do you actually
> address Steinar's question, which is "What does this rant have to do with
> *ignoring* *DNS* *TTL*?"

Try actually reading the long paragraph. It starts with the interesting
sentence 'The data he showed isn't necessarilly "ignoring ttl".', and I
then explain why that is.

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