The Process Group Approach to Reliable Distributed Computing

Abstract
The difficulty of developing reliable distributed software is an impediment to applying distributed computing technology in many settings. Experience with the ISIS system suggests that a structured approach based on virtually synchronous process groups yields systems which are substantially easier to develop, fault tolerant, self managing. This paper reviews six years of research on ISIS, describing the model, the types of applications to which ISIS has been applied, and some of the reasoning that underlies a recent effort to redesign and reimplement ISIS as a much smaller, lightweight system.

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