[155627] in North American Network Operators' Group
Re: DNS caches that support partitioning ?
daemon@ATHENA.MIT.EDU (Aaron Hopkins)
Mon Aug 20 11:00:46 2012
Date: Mon, 20 Aug 2012 08:00:00 -0700 (PDT)
From: Aaron Hopkins <lists@die.net>
To: "Patrick W. Gilmore" <patrick@ianai.net>
In-Reply-To: <76D701C9-00F6-4EC4-A618-2D6E53664AAB@ianai.net>
Cc: North American Operators' Group <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Sat, 18 Aug 2012, Patrick W. Gilmore wrote:
> IMHO, if Google losses a datacenter and all users are stuck waiting for a
> long TTL to run out, that is Very Bad. In fact, I would call even 2.5
> minutes (average of 5 min TTL) Very Bad. I'm impressed they are
> comfortable with a 300 second TTL.
Google is very aggressive about reducing user-visible latency, of which they
cite DNS as a significant contributing factor. They may be choosing to
strike a different balance of faster when everything is working correctly vs
faster to recover when something breaks.
-- Aaron
