Details of Propagation

[Whizkid25468]

"Jeff Lasman" <jblists at nobaloney.net> wrote in message
news:bfrihb$jf0$1 at sf1.isc.org...
> Whizkid25468 wrote:
>
> > I am, com, I meant to write com's servers (that was a, uhh, keyboard
error,
> > yeah, keyboard), but knowing about the root servers can't hurt /;-)<<.
So
> > when are com's servers supposed to be updated?
>
> I, too, keep hearing 5am and 5pm, and I'm certainly no expert, but I
> have seen that when I change a nameserver's IP# or add a nameserver at
> some point in the afternoon (I'm in California, PDT, currently -0700),
> it's usually in the TLD servers by the next morning.  So 5am/5pm is
> definitely a possibility (as uncertain as that sounds).

Well, further agreement (no matter how uncertain) is nice. /:-)<<

>
> > > > Finally, I've been *unreliably* informed that propagation time from
the
> > > > point of view of using your ISP's nameserver can depend on the size
of
> > your
> > > > ISP, the type of nameserver you're on, and how often it's *set to
> > update*.
> > > > Isn't propagation (once the root servers update) purely dependant on
the
> > > > TTLs of the affected records? The size of the ISP shouldn't matter!
> > >
> > > True.
> >
> > Oh good, my entire understanding of the DNS isn't completly off the mark
> > then /:-)<<.
>
> Again, I'm no expert, but it's been my experience (and I've heard from
> others) that aol seems to ignore TTL and has their own agenda for
> updating.  Some people add that they only do it if the TTL is
> "unreasonably" short, but no one seems to know what "unreasonably" means
> <frown>.

Hmm, I don't like people who don't follow standards. If everyone follows one
standard, and you know it, you know how an awful lot of people do things. If
people do things differently there are more variables involved. But AOL
overriding TTLs isn't really a major worry, who cares if a few AOLers can't
see a website or two?

>
> > Unless you use Dynamic DNS /:-\<<. A component of that is to turn the
TTL
> > down really low on your records, isn't it?
>
> That depends on how badly you want your systems to be found <smile>.  In
> general yes, but you shouldn't be using Dynamic DNS for systems visible
> on the 'net, and for local DNS, it doesn't really matter.

It's a funny idea, turning down the TTL. The whole 'take the load off
individual systems' thing kinda gets lost somewhere.

>
> And in case you haven't noticed, there's still a lot of mystery in what
> is without a doubt the most important service on the Internet.

Yeah, noticed that. Oh well. /;-)<<

>
> Jeff
> --
> Jeff Lasman, nobaloney.net, P. O. Box 52672, Riverside, CA  92517 US
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