On 22 September 2014 11:03, Tony Finch <d...@dotat.at> wrote: > I can see roughly three ways this might be done, in order of increasing > complexity... > > (1) Master-only. The master observes an ANAME record at the apex of a zone > it loads and uses it to periodically refresh the relevant records in the > zone (as if you had a cron job running dig | magic | nsupdate). > > Disadvantage: potentially lots of XFR traffic if the TTLs are low. > > Why would TTL be relevant here?
Is the master not acting as a "partial slave" for the target RRs? In which case, the timing should depend on the SOA refresh period. No reason to do XFR. Each (assuming these to be plural) ANAME target could be resolved independently. Rs Dick
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