Adding More Name Servers
When you need to create new name servers for your domain, the simplest recourse is to add secondaries. You already know how—we went over it in Chapter 4—and once you’ve set up one secondary, cloning it is a piece of cake. But you can run into trouble if you add secondaries indiscriminately.
If you run a large number of secondary name servers for a zone, the primary master name server can take quite a beating just keeping up with the secondaries’ polling to check that their zone data is current. There are a number of courses of action to take for this problem, as described in the sections that follow:
Eliminate the secondary name servers altogether by using Active Directory integration.
Increase the refresh interval so that the secondaries don’t check so often.
Direct some of the secondary name servers to load from other secondary name servers.
Create caching-only name servers.
Create partial-secondary name servers.
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