On Fri, May 18, 2007 at 01:11:23AM -0300, Eduardo Kienetz wrote: > > I would suggest you lower your DNS refresh period a few days before > migration. That would mean that servers will come more often to check > if anything in you DNS has changed. It should be done a few days > (maybe weeks) before because it needs to propagate to some servers who > cache DNS info. > Then the DNS part hopefully would be smoothier.
It is also worth noting that some ISPs configure their DNS servers to completely ignore TTL published by individual domains. If an appreciable number of your users have their access provided by some such provider, they will experience problems until the ISP DNS servers sort themselves out. Regards, -Roberto -- Roberto C. Sánchez http://people.connexer.com/~roberto http://www.connexer.com
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