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Distributed systems commonly contain heterogencity at all lcvels of systems structure, differentiated by function (special servers), operating systems and architecture within a single system. On the other hand, large mainframes tend to be more homogeneous in their structures, even when they are multiprocessors. This paper explores a way of using the models(More)
in this technical essay are discussions of the nature of distributed systems, design processes associated with the distribution of processing, and the conditions under which benefits accrue. The essay concentrates on some of the major benefits expected from distributed systems so as to provide a context in which to judge particular designs and their(More)
The Object >1odel of an Operating System is a structural model for an operating system as well as a design methodology. It is widely described in the literature and is represented by a number of commercial and university machines. The central concept is that a system is a collection of objects existing in an apparent single level addressing space. Each(More)