Database backed DNS systems

Picked one by one from a mixed channel. Transcript check: both title readers certain; 5 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include only full-length, single-topic technical presentations whose title matches the content (e.g., kernel interfaces, NFSv4 ACLs, LD_PRELOAD, CELT, IPv6, MythTV internals); exclude lightning talks, panels, debates, BoFs, and short Q&A-only or split fragments.