Forwarding Environment
Niall O'Reilly
Niall.oReilly at ucd.ie
Mon Jun 11 08:09:03 UTC 2007
On 10 Jun 2007, at 18:57, Danny Mayer wrote:
> If the subcontractor comes back and
> says that it's because they are pooling cached results it's really not
> buying you anything. There are just too many names being searched to
> make the benefit likely and too many risks. DNS is by its design
> distributed so having requests funneled is self-defeating.
It sounds like the OP's subcontractor is stuck in some kind of time
warp. Back about 1990, funneling of this kind was useful, because
of the discrepancy in both cost and available capacity (same thing,
perhaps?) between the high-speed Ethernet LAN and the low-speed,
expensive uplink. A WAN connection at 64kb/s was expensive, and
sites often had no more than a 9.6k connection to the global
Internet. It paid to make the most of cached DNS answers.
Nowadays, unless you're on the wrong side of the "digital divide",
there's no case for the design described.
Best regards,
Niall O'Reilly
University College Dublin IT Services
PGP key ID: AE995ED9 (see www.pgp.net)
Fingerprint: 23DC C6DE 8874 2432 2BE0 3905 7987 E48D AE99 5ED9
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