bradfitz and I just went down to the NOC (our FAVORITE place in the world) to install one of the two new database servers.
In beginning the cluster move, we took two of the existing database machines out of cluster 0 (the "old" site) to create cluster 1. Very few users are actually already on cluster 1. This means speed problems. We're temporarily putting the backup machine into rotation to try to take up some of the slack.
Once this new server is set up, it will be able to pick up the traffic from the 2 "displaced" servers until we get more of the cluster conversion done. Then, it will become a cluster master server.