Introduction - If you have any usage issues, please Google them yourself
The Staged Event-Driven Architecture (SE DA) is a new design for building scalable Intern et services. SEDA has three major goals : To support massive concurrency. on the order of tens of thousands of clients per n ode To exhibit robust performance under wide va riations in load and, To simplify the design of complex Internet serv ices. SEDA decomposes a complex, event-driven application into a set of stages c onnected by queues. This design avoids the high overhead associated with thread-based concur rency models, and decouples event and thread scheduling from application logic. SEDA enables services to be well-conditioned to load, preventing resources from being overcommitte d service when demand exceeds capacity. Decomp osing services into a set of stages also enables modularity and cod