Steve Gibbard wrote:
So from my uninformed vantage point, it looks like they started doing
this more or less right -- two servers or clusters of servers in two
different facilities, a few thousand miles apart on different power
grids and not subject to the same natural disasters. In other words,
they did the hard part. What they didn't do is put them in different
BGP routes, which for a network with as much IP space as Qwest has would
seem fairly easy.
I didn't get to play detective at the time of the outage, but
configutation (which is automatically replicated) may also have been
enough to take out both nameservers.
It also makes good management sense to run your nameservers with the
same software and versions, but perhaps it doesn't make good continuity