Models of Distributed Computing

Abstract

This chapter discusses the main distributed systems models. As an introduc-tion, it sets the context by addressing the main facets of the problem. Frame-works clarify what can be done given different assumptions on failures and synchronism, explaining that we can structure distributing computing along different vectors serving different needs. Strategies help the architect reason about the available ways to go in order to serve her requirements and objec­tives. Then two more fundamental issues are addressed before delving into the system models: explaining the main differences between the synchronous and asynchronous formal frameworks for distributed computing; and presenting the primitive classes of distributed activities and their overall scheme of operation, for understanding the purposes of distribution. Finally, the chapter presents known models such as: client-server with RPC, group-oriented, distributed shared memory, message buses.