What DNS Is Not

Simon Lyall simon at darkmere.gen.nz
Sun Nov 8 19:35:30 CST 2009


On Sun, 8 Nov 2009, Alex Balashov wrote:
> For example, perhaps in the case of CDNs geographic optimisation should be in 
> the province of routing (e.g. anycast) and not DNS?

Well my first answer to that would be that GSLB scales down a lot further 
than anycast.

And my first question would be what would the load on the global routing 
system if a couple of thousand (say) extra sites started using anycast for 
their content?

Each would have their own AS (perhaps reused from elsewher in the 
company) and a small network or two. Routes would be added and withdrawn 
regularly and various "stupid BGP tricks" attempted with communitees and 
prefixes.

I heard some anti-spam people use DNS to distribute big databases of 
information. I bet Vixie would have nasty things to say to the guy who 
first thought that up.

-- 
Simon Lyall  |  Very Busy  |  Web: http://www.darkmere.gen.nz/
"To stay awake all night adds a day to your life" - Stilgar | eMT.





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