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Date:      Sat, 4 Apr 1998 11:18:04 -0800 (PST)
From:      Tom <tom@uniserve.com>
To:        Wes Peters - Softweyr LLC <softweyr@xmission.com>
Cc:        robert+freebsd@cyrus.watson.org, stable@FreeBSD.ORG
Subject:   Re: Hesiod support on 2.2
Message-ID:  <Pine.BSF.3.96.980404111339.17684C-100000@shell.uniserve.com>
In-Reply-To: <199804032219.PAA17773@xmission.xmission.com>

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On Fri, 3 Apr 1998, Wes Peters - Softweyr LLC wrote:

> DNS wasn't really designed with a highly volatile dataset in mind.  If
> it takes a day or two for the existence of a new workstation to trickle

  No.  New records are available immediately.  If someone has looked up
the record before it was added, there may be some negative cache entries
around which will expire in 10 minutes.

> across the net, that's generally not too bad, but if it takes a day or
> two for my new password to trickle across the net, I cannot reliably
> predict if I can login or not.

  This would involve changing an existing entry, not adding a new entry.
This is rather different, because previous version(s) of the record can be
cached.

> You can, of course, fix this problem by using short expirations on the
> zone your login information is stored in, but that doesn't change the
> basic design limitation.

  NOTIFY support in BIND 8.1 helps a lot.  Secondaries update immediately
now.

Tom


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