Multiple, identical web servers process requests and serve web content in parallel. If one of these servers fails, the others can easily take over its work. The servers are connected inside the secure Amazon cloud to the secure Primary Datastore. By leveraging Amazon's cutting-edge RDS technology
, this database can be upgraded in real time to more powerful hardware as needed. Moreover, the Primary Datastore is mirrored in real time to a second location. In the event that the Primary Datastore is corrupted or even completely wiped out, the real-time mirror will automatically take over with absolutely no interruption in service. As a final redundancy measure, additional backups of all critical data are created nightly and archived in a third location.