Walking the DNS Tree

Whirlycott - Philip Jacob Walking the DNS Tree: "The DNS Rapid Update service that was put into place several months ago is really wonderful. If you make a change to the nameservers associated with a zone, the changes appear in the root servers almost immediately. In many cases, changes to a zone will start resolving right away, but due to record caching, sometimes clients wont actually see the new record information for a while (until their local cache entries expire)."