Non-Stop Hadoop applies WANdisco’s patented replication technology to deliver the first and only continuous availability solution for globally distributed deployments. All NameNode servers in a Hadoop cluster deployed over a WAN actively support clients at each location and along with the data nodes, are continuously synchronized. The result is LAN-speed performance and access to the same data at every location. Failover and recovery are automatic both within and across data centers. Whether a single server or an entire site goes down, Hadoop is always available.