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Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt

Nicholas Weaver <nweaver@ICSI.Berkeley.EDU> Fri, 29 January 2010 19:14 UTC

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Cc: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>, namedroppers@ops.ietf.org
From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
Subject: Re: [dnsext] Re: I-D ACTION:draft-vandergaast-edns-client-ip-00.txt
Date: Fri, 29 Jan 2010 11:07:56 -0800
To: Wilmer van der Gaast <wilmer@google.com>
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On Jan 29, 2010, at 10:42 AM, Wilmer van der Gaast wrote:

> Let m* Making larger netmasks (i.e. lowering the number) optional:
> Although I'm not against making this a weak recommendation, doing this
> affects not only the auth. resolver with generating more traffic, it
> does also increase cache pressure on the resolver. Needs more
> discussion.

Actually, it should decrease the cache pressure on the resolver, as it allows the authority to say "you can cache this for a larger fraction of the users than you asked about".

Depending on the resolver's cache (fixed netmask vs variable netmask, and capacity), the resolver may cache it for just the original netmask or the larger netmask, depending.

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