The concept of an intelligent software agent has emerged from its origins in artificial intelligence laboratories to become an important basis for the development of distributed systems in the mainstream computer science community. This paper provides a review of some of the ideas behind the intelligent agent approach and addresses the question “what is an agent?” Some principle application are...

A new high-level approach to interprocess communication in heterogeneous distributed systems in introduced, This approach, called I/O Abstraction, allows one to write each functional component of a distributed system as an encapsulated program that acts upon a set of local data structures, some of which may be published for external use. The functional components are separately configured by es...

Recently, high-level languages such as MATLAB have become popular in prototyping algorithms in domains such as signal and image processing. Many of these applications whose subtasks have diverse execution requirements, often employ distributed, heterogeneous, reconfigurable systems. These systems consist of an interconnected set of heterogeneous processing resources that provide a variety of ar...

The problem of mapping tasks and communications onto multiple machines and networks in a heterogeneous computing environment has been shown to be NP complete. Therefore, the development of heuristic techniques to find nearoptimal solutions is required. Many different types of mapping heuristics have been developed in recent years. However, selecting the best heuristic to use in any given scenar...

Distributed systems now encounter extreme heterogeneity in the form of diverse devices, network types etc., and also need to dynamically adapt to changing environmental conditions. Selfadaptive middleware is ideally situated to address these challenges. However, developing such software is a complex task. In this paper, we present the Gridkit self* approach to the engineering of reflective midd...

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A heterogeneous distributed database system (HDDBS) is a system which integrates pre-existing databases to support global applications accessing more than one database. This paper outlines possible approaches to concurency control in 1LI)DBSs. The top-down approach emerges as a viable paradigm for ensuring the proper concurrent execution of global transactions ia an HDDBS. The primary contribut...

Heterogeneous computational platform offers a great ratio between the computational power and the price of the system. Static and dynamic scheduling methods offer a good way of how to use these systems efficiently and therefore many algorithms were proposed in the literature in past years. The aim of this article is to present the dynamic (on-line) algorithm which schedules multiple DAG applica...

The robustness of distributed systems is usually phrased in terms of the number of failures of certain types that they can withstand. However, these failure models are too crude to describe the different kinds of trust and expectations of participants in the modern world of complex, integrated systems extending across different owners, networks, and administrative domains. Modern systems often ...