Re: [DNSOP] New Version Notification for draft-pusateri-dnsop-update-timeout-00.txt

Ted Lemon <mellon@fugue.com> Mon, 27 August 2018 03:20 UTC

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From: Ted Lemon <mellon@fugue.com>
Date: Sun, 26 Aug 2018 23:20:30 -0400
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To: Mark Andrews <marka@isc.org>
Cc: Tom Pusateri <pusateri@bangj.com>, dnsop WG <dnsop@ietf.org>
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Subject: Re: [DNSOP] New Version Notification for draft-pusateri-dnsop-update-timeout-00.txt
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If we do that, why do we need a hash at all?

On Sun, Aug 26, 2018 at 10:51 PM Mark Andrews <marka@isc.org>; wrote:

> I would add a covered type field to TIMEOUT (c.f. RRSIG).  I also wouldn’t
> have more than
> a single timeout per record.  I’m tempted to say a single hash as well.
> If there is multiple
> timeouts per record then the blocks need to be sorted in timeout order.
>
> Covered is there to reduce the number of RR’s that need to be hashed to
> remove a record.
> It will also reduce the size of IXFR’s as you don’t need to re-construct a
> new TIMEOUT
> record that covers every timeout at a name on each change.
>
> For all records at a name is often more expensive that for all records of
> type covered.
> Name servers are optimised for looking up <name,type,class> tuples rather
> than <name,class>
> tuples.
>
> Sorting of timeout blocks is so that you can look at the first timeout
> when working out
> which TIMEOUT needs to be processed first in a zone.
>
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> <https://maps.google.com/?q=1+Seymour+St.,+Dundas+Valley,+NSW+2117,+Australia&entry=gmail&source=g>
> PHONE: +61 2 9871 4742              INTERNET: marka@isc.org
>
>