LEAST SUFFERING STRATEGY IN DISTRIBUTED REAL-TIME PROGRAMMING LANGUAGE DROL

This paper describes a communication model for distributed real-time o bjects, called the Distributed Real-time Object (DRO) model. The main characteristic of this model is the notion of least suffering. Least s uffering assures users to be notified network and computer faults with in a required timing constraint and supports rapid recovery from them. Consequently, this notion allows users to construct real-time applica tions on widely distributed environments. The notion has been implemen ted in the programming language DROL which is an extension of C++. Thr ough the design and implementation of a DROL programming environment o n the ARTS kernel, we examine costs of least suffering in a network-wi de object invocation. We also show the effectiveness of least sufferin g, through description of application programs and discussion of their behavior.