DNS Cache, database backends...

[D. J. Bernstein]

> A toy database back-end is provided in contrib/sdb in BIND9. This
> serves as proof of concept.

This is another area where BIND 9 lags behind djbdns. The standard
djbdns server, tinydns, already works from a fast on-disk database.
See http://cr.yp.to/djbdns/ad/server.html.

Don't be scared by the ``tinydns'' name. The fourth-largest DNS hosting
company---currently 280000 *.com domains, 22000 *.net domains, etc.---is
using tinydns to publish all that information from a single database.

---Dan