DNS Maintenance

[Chris Hills]

On 08/07/09 15:46, Alans wrote:
> Hi,
>
> Can someone tell me how webhosting providers or ISPs do maintenance on
> their DNSs?
>
> I mean, can they take it offline? What is the procedure usually?

Hi

You can use a load balancer in front of your DNS servers, and remove the 
host from the pool when maintenance is needed.

Another approach is to run your servers as virtual machines. With a 
platform like VMware you can move the guest from host to host without 
disruption using vmotion, which allows maintenance to be performed on 
the host. However, this will not help if you need to do a software or 
kernel upgrade on the guest.

Regards,

Chris Hills