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Re: [DNSOP] New Version Notification for draft-wkumari-dnsop-hammer-00.txt

Paul Wouters <paul@cypherpunks.ca> Sat, 13 July 2013 23:27 UTC

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Date: Sat, 13 Jul 2013 19:27:39 -0400
From: Paul Wouters <paul@cypherpunks.ca>
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To: Warren Kumari <warren@kumari.net>
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Cc: dnsop <dnsop@ietf.org>, Matthijs Mekking <matthijs@nlnetlabs.nl>
Subject: Re: [DNSOP] New Version Notification for draft-wkumari-dnsop-hammer-00.txt
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On Wed, 3 Jul 2013, Warren Kumari wrote:

>> prefetch: <yes or no>
>>     If yes, message cache elements are prefetched before they expire
>>     to  keep  the  cache  up to date.  Default is no.  Turning it on
>>     gives about 10 percent more traffic and load on the machine, but
>>     popular items do not expire from the cache.
>
> Doh, sorry, I was not aware that Unbound did this. I'd like to recognize this in the draft, any idea who actually suggested it / added it to the code?

I'm pretty sure Wouter added the code, but I'm not sure who came up with
the idea. Probably multiple people. It's a feature you really need when
running DNS(SEC) on the stub or else you're continuously dealing with
waiting on DNS.

I believe the option was added to unbound 1.4.2 released around march 2010,
and the RHEL and Fedora packages enabled prefetching then as well. So
it's been there for over three years!

Paul

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