DNS on different servers

Hello,

In order to keep a web site always online I am thinking the following...

I have two servers on different datacenter. On the site I am interested I want put the following DNS:

Primary DNS: ns1.server1.com
Secondary DNS: ns1.server2.com

Will it work? If one server fails will my visitors go automatically to the second one? Any conflicts?

Please advice..

 

 

 

 

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