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Re: Our old friends, weak ETags

From: Poul-Henning Kamp <phk@phk.freebsd.dk>
Date: Fri, 20 Jul 2012 07:58:22 +0000
To: Carsten Bormann <cabo@tzi.org>
cc: HTTP Working Group <ietf-http-wg@w3.org>
Message-ID: <21925.1342771102@critter.freebsd.dk>
In message <7C4B2D6A-4847-49ED-A6E1-1DA8CF672A00@tzi.org>, Carsten Bormann writ
>On Jul 20, 2012, at 09:25, Poul-Henning Kamp wrote:
>> binary
>See also RFC 5905 section 6.


Although I think going full NTP is overkill, in particular because
timestamps tend to have very high entropy in the lower bits.

I think chosing a 16bit fraction will last us 20 years, but more
importantly, expanding a 16bit fraction to 32bits is just a matter
of stick on more bits, whereas a 16bit count of milliseconds is
a nightmare to extend.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
Received on Friday, 20 July 2012 07:58:48 UTC

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