User blog comment:Wade Warren/How we deliver pages to you/@comment-4115045-20120301214338/@comment-3475413-20120302183853

Pim, that is a difficult question to answer. I could fill volumes of space (and others have) on the challenges of implementing near real-time geographical multi-master database replication.

We haven't yet found a solution that will work in our service due to the variety and depth of our content.

We are constantly looking at ways to minimize the impact on our editors when we have maintenance or service interruptions in our primary data center. Believe me, no one will be more happy than me when we find the answer!