DNS Cluster questions on setup, redundancy and multiple servers

Hi guys,

I'm planning to setup DNS cluster on my server but after reading articles and forum posts, I haven't found answers to some of my questions yet. Here you go:

1. Can you setup up more than 2 nameservers for the DNS clusters. I wanted to have at least three locations for my DNS servers. 1 = Primary server (SERVER-A), and the two remaining will only have cPanel DNSONLY installed (DNS-1 & DNS-2).

2. If I am going to have another cPanel/WHM server, that means I'll have two servers now (SERVER-A and SERVER-B), is it possible to use the same DNS servers I setup before (DNS-1 and DNS-2)? So the two DNSONLY servers will be catering to DNS requests of both cPanel/WHM servers.

3. How does DNS cluster actually help if I decided to migrate the data of SERVER-A to a new server (SERVER-C)?

4. SERVER-A is actually a live server. If I decided to do a DNS cluster today, all I have to do is change the nameservers IP in my domain registrar, right? Will these incur any downtime?

Thank you very much.

 

Thanks Travis for the quick reply!

May I know how will I achieve this "Server-C will tell Server-A to make the changes on the DNSONLY machine."? Will these be done automatically or should I make some manual configurations/button clicks?