I am no expert at the technical aspects of DNS and web hosting.
I understand that we require at least two DNS entries per domain name.

Could I thus assume that to achieve close to the 100% uptime, I can have my same (site) hosted on two servers ? And using the Primary DNS pointing to the DNS of the first host and the Secondary to the second.

Does it work in that when the first server cannot be down cos of say connection outrage or something that the user would be redirected to the DNS of the 2nd host ? Thus providing a higher uptime ?

Thanks.

Edwin

Originally posted by eddy2099
I am no expert at the technical aspects of DNS and web hosting.
I understand that we require at least two DNS entries per domain name.

Could I thus assume that to achieve close to the 100% uptime, I can have my same (site) hosted on two servers ? And using the Primary DNS pointing to the DNS of the first host and the Secondary to the second.

Does it work in that when the first server cannot be down cos of say connection outrage or something that the user would be redirected to the DNS of the 2nd host ? Thus providing a higher uptime ?


You could mirror your web site on two web servers and use 'round robin' DNS. This is done by creating multiple records for one host. For example www.yourdomain.com would point to
both web servers. I don't think that the round robin DNS trick is full proof though.

Having two nameservers is a good idea too, both on seperate networks. I still have to laugh at hosts who have all of their nameservers on the SAME network because if you lose network connectivity, you are dead to the world until it comes back up. Not only do you lose hits to your site, but you may lose mail too. Kinda defeats the whole purpose of redundancy ;) I suppose if you have a lot of backbone providers with multiple connections it's not so bad having both nameservers on one network.