Re: Practicality of DNS

Greg Stein (gstein nospam at lyra.org)
Thu, 11 Mar 1999 04:43:42 -0800

Robin,

If you want to provide the zone file entries for me, then I can delegate
these subdomains from cdin.org to your servers.

If anybody else would like delegations (or hostnames!) off of cdin.org
for testing purposes, then I'd be quite happy to do so. Please just send
me what you'd need. The cdin.org domain *is* for the community to use,
after all.

Cheers,
-g

robin nospam at acm.org wrote:
>
> I had a go at converting some of my CD collection to a DNS database.
> I did whole TOCs, cddb IDs, disk titles and composer/artist/performer
> information that I entered myself. There is no track info yet.
>
> cd.ro.nu. has the following subdomains:
> artist-to-key key-to-artist
> cddbid-to-key key-to-cddbid
> composer-to-key key-to-composer
> performer-to-key key-to-performer
> title-to-key key-to-title
> toc-to-key key-to-toc
>
> So a client dialogue might go:
> $ host -t txt 250ca616.cddbid-to-key.cd.ro.nu.
> 250ca616.cddbid-to-key.cd.ro.nu descriptive text "key=10089"
> $ host -t txt 10089.key-to-title.cd.ro.nu.
> 10089.key-to-title.cd.ro.nu descriptive text "title=trumpet concertos"
> $ host -t txt 10089.key-to-composer.cd.ro.nu.
> 10089.key-to-composer.cd.ro.nu descriptive text "composer=telemann"
> $ host -t txt 10089.key-to-performer.cd.ro.nu.
> 10089.key-to-performer.cd.ro.nu descriptive text "performer=st martin in the fields"
>
> When experimenting with the whole-TOC lookup method, I found three things:
> * The first track frame offset is likely to be one of only a few values,
> whereas the last track frame offset varies very widely. So it makes
> sense to list the offsets in normal left-to-right order.
> * Using only the start-track frame offsets is certain to
> lead to collisions. Disks with only one tracks are likely to be
> indistinguishable. So I include the lead-out offset in my TOC.
> Neither cddb nor cdindex-mark-2 include this; is it unreliable
> or something? cddb includes the total play time as a feeble
> disambiguator.
> * Printing the frame offsets in decimal as I do can easily exceed the
> maximum size DNS query my tools can handle. Choosing a more compact
> representation like hexadecimal differences might help a bit, but
> still won't be enough for 99-track disks.
>
> But with those provisos, it works:
> $ host -t txt 33.9008.10758.21933.33733.46233.55233.64083.72783.80883.93145.107133.122808.133158.148645.158958.174758.195258.208308.212733.229353.232595.242883.toc-to-key.cd.ro.nu.
> 33.9008.10758.21933.33733.46233.55233.64083.72783.80883.93145.107133.122808.133158.148645.158958.174758.195258.208308.212733.229353.232595.242883.toc-to-key.cd.ro.nu descriptive text "key=10089"
>
> Robin.
> --
> R.M.O'Leary <robin nospam at acm.org> +44 7010 7070 44, PO Box 20, Swansea SA2 8YB, UK

--
Greg Stein, http://www.lyra.org/