I agree with everything you said. > Having a cache whose design allows it to be stale but only very rarely seems like a bad idea. And that's exactly why we fi

I agree with everything you said. > Having a cache whose design allows it to be stale but only very rarely seems like a bad idea. And that's exactly why we first brought this number from 6 9's to more than 10 9's; and we are not done yet. Also the cache is not "designed" to be inconsistent. It's like Paxos is designed to solve the consensus problem, but when implemented, most Paxos implementations do not work properly.