Clustering creates redundant Unwired Platform components on your network to provide a highly scalable and available system architecture.
As an organization grows, its need for a scalable IT infrastructure in its environment becomes more critical. Organizations can seamlessly achieve high availability and scalability by adding more or redundant instances of core components. Redundant instances of critical components provide transparent failover. By adding one or more instances of a component, you design a scalable system architecture that simultaneously delivers better performance.
In a production environment, the Unwired Platform deployment typically uses at least one relay server. This is typically not required for shared development environments, or for single-node personal development or trial environments, unless you are testing across a firewall or using a wireless connection from a service provider.