mailing list archives
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.