[dns-operations] Who Ignores TTLs ?
rick.jones2 at hp.com
Thu Feb 17 17:31:23 UTC 2011
Mark Andrews wrote:
> It's the apps not the caches that don't respect TTLs.
Well, they can't really. Certainly not directly. Getaddrinfo() (or
gethostbyname()) don't give TTL information to the application. The only way
they could "respect" the TTLs would be to make a getaddrinfo() call before every
connection, no matter how short-lived, in which case the complaint would be
applications making too many DNS queries and every end point in the Internet
should run their queries through a system local cache.
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