Multiple DNS and WebServers

[karthikj]

Hi,

I have a web site

http://www.xyz.com

in Location A with ip address x.x.x.x1 and i have mapped it in our DNS Server Location A. Now we are planning to have replica of the website

http://www.xyz.com

at location B. The IP Address is y.y.y.1 and it is mapped to our DNS Server in Location A. We have our DNS Server in Location B which has been mapped for

http://www.xyz.com

with x.x.x.x1 and y.y.y.y1. Now If location A completely go down, can my site be accessed through Location B immediately and Vice-Versa? How can i have Website Mirroring between

http://www.xyz.com

which is spread accross geographical locations?

Thanks in Advance

J.Karthik