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Re: DNS caches that support partitioning ?
From: Aaron Hopkins <lists () die net>
Date: Mon, 20 Aug 2012 08:00:00 -0700 (PDT)

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


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