[LEAPSECS] stale leap second information

[Poul-Henning Kamp]

--------
In message <20150116020949.9753140600C at ip-64-139-1-69.sjc.megapath.net>, Hal Mu
rray writes:

>Is DNS light weight enough that it's not worth the effort to avoid extra 
>lookups?
>
>Can the DNS TTL be used for that?  I'm not a DNS wizard, but I don't think 
>the data files feeding the current DNS servers are setup to process 
>valid-until-xxxx.  A cron job could update the TTL each night.

Not quite.

You put a file on the server that says "You can serve these entries
with a TTL of (whatever number of seconds you like).

Clients do a lookup and get the TTL and don't need to do another
lookup until the TTL expires.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.