What's difference?

[Kevin Darcy]

Joseph S D Yao wrote:

> On Sat, Sep 23, 2000 at 12:24:35AM +0700, Patrick wrote:
> > 1st sceanario
> >
> > mail  IN A    202.133.122.141
> > mail1 IN A    202.133.122.141
> >
> > 2st sceanario
> >
> > mail  IN A    202.133.122.141
> > mail1 IN CNAME        mail
>
> 2d scenario advantage: single point to make any changes to the IP
> address.
>
> 2d scenario disadvantage: you can no longer use "mail1" in an MX
> record.  Also, two database references required to return an IP
> address.  This may turn into two queries, depending on what your real
> situation is.

1st scenario disadvantage: reverse-record ambiguity. Should the reverse
record for 202.133.122.141 point back to "mail" or "mail1"? It's only a
_minor_ disadvantage though...


- Kevin