DNS Zone entry : if onw server down -> go to second server

Can anybody help me with this?

I have two hosts and one domain name. I want that if the server 1 is down , the visitor should be taken to the next server.

I tried adding server2 dns address to the name server list of domain name but this does not work as it is not a seqencial dns list.

Since the website is a dynamic website with database, replicating the complete website on the second server in next to impossible, but we can have page on the server 2 that "The server 1 is down for maintenance." Some thing of this sort.

Can anybody please help me!

 

 

 

 

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