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To avoid loss of service during a migration, timing is critical. You should assume that, for the TTL period, some Internet users around the world will see older, cached data, which points to your old DNS provider.
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For name server records, this can be a long time – hours or even days. If everything is working as it should, the maximum length of time a record is cached by a recursive server is determined by the “Time to Live” (TTL) setting, which is set by the website owner. There are performance, as well as economic, reasons for doing this. Almost every time a DNS answer is sent in response to an Internet user’s request, that information is cached (stored) on a recursive name server somewhere close on the network, such as at the user’s ISP. Similarly, to maintain a consistent user experience during a DNS migration, it makes sense to use two providers simultaneously, and only switch the legacy service off when your DNS is fully operational with the new provider.Īt the technical level, migrations can be tricky. To avoid having your revenue stream interrupted, it's better to open the new restaurant first, and then close the old one. But while this move is happening, you're not selling any burgers, which means you’re losing revenue. You can shut down one restaurant, pack everything into a truck and haul it off to your new premises. Let’s say you're in the business of selling fast food. Think about changing DNS providers much like changing the physical address of a store. DNS is the glue holding your Internet presence together, so major changes always need to be carefully considered before they are implemented.
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Switching your DNS provider is not a trivial matter like switching your toner or stationery provider. With many players in the Managed DNS market, and countless solicitations arriving in your voice mail and inbox, you may arrive at the tipping point where you are ready to switch DNS providers. Enterprises are learning that massively redundant, scalable and geographically diverse DNS resolution is both a critical technology function, and a function that is most economically outsourced. DNS Migration - Strategies for Changing DNS Providers Without Disruptionĭid you know that when you switch from one DNS provider to another, you are arguably at the highest risk to shut your online presence down? As mundane as it sounds, DNS service is one of the fundamental elements to ensuring that your website is live and your emails work.