DNS Server Specs/Calculation

I am trying to figure out if there is a calculation that I can figure out what size DNS server I might need. Or I want to have the ability to know how many queries a certain server can handle.

What do you guys recommend for a dedicated dns server? DNS is one of the most critical functions and I want to treat it that way. So I want to hear what you guys have to say.

Thank you.

 

 

 

 

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