Re: Tips for DNS zone administration

[Sam Trenholme]

> >      * If possible, make the TTLs for the NS records for your domain as
> >        long as possible (604800 seconds--one week, is a good number).
> >        This will speed up accesses to your domain, since caches will not
> >        have to query the root servers as often before querying your name
> >        servers.
>
> If you do remember to set it down well before any changes... I think that
> TTL's over 1-2 days should be well motivated before use.

I can think of two reasons for this thinking:

* Care needs to be taken to lower the TTL before changing any information.

* Some nameservers do not have a cap on the number of records they store
  in their cache.

- Sam