A New Approach to the Design of High Performance Multiple Disk Subsystems: Dynamic Load Balancing Schemes

The performance of storage subsystems has not followed the rapid improvements in processors technology, despite the increased capacity and density in storage medium. Here, we introduce a new model based on the idea of enhancing the I/O subsystem controller capabilities by dynamic load balancing on a storage subsystem of multiple disk drives

Web Data Accessing and the Web Searching Process

The enormous growth in the number of documents circulated over the Web increases the need for improved Web data management systems. Web data accessing and Web searching are the main processes in Web data management systems. In order to evaluate the performance of such systems, various simulation approaches must be used. In this paper, we survey the most recent approaches for Web data representation, Web data accessing as well as for Web search engines

Designing a Learning-Automata-Based Controller for Client/Server Systems: A Methodology

Polling policies have been introduced to simplify the accessing process in client/server systems by a centralized control access scheme. This paper considers a client/server model which employs a polling policy as its access strategy. We propose a learning-automata-based approach for polling in order to improve the throughput-delay performance of the system. Each client has an associated queue and the server performs selective polling such that the next client to be served is identified by a learning automaton. The learning automaton updates each client's choice probability according to the feedback information. Under the considered approach, a client's choice probability asymptotically tends to be proportional to the probability that this client is ready. Simulation results have shown that the proposed polling policy is beneficial in comparison to the conventional round-robin polling when operating under bursty tra#c conditions. The benefits are significant for the delay reduction in the considered client/server system

Simulation In Web Data Management

The enormous growth in the number of documents circulated over the Web increases the need for improved Web data management systems. In order to evaluate the performance of these systems, various simulation approaches must be used. In this paper, we study the main simulation models that have been deployed for Web data management. More specifically, we survey the most recent simulation approaches, for Web data representation and storage (in terms of caching) as well as for Web data trace evaluation

Applying optical reconfiguration on ATM switch fabrics

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Performance Evaluation of Acoustic Underwater Data Broadcasting Exploiting the Bandwidth-Distance Relationship

Despite being a fundamental networking primitive, data broadcasting has so far received little attention in the context of underwater networks. This paper proposes an adaptive push system for data broadcasting in underwater acoustic wireless networks with locality of client demands. The proposed system exploits the characteristic relationship between the bandwidth of an underwater acoustic link and the transmitter-receiver distance in order to improve performance in environments with locality of client demands. Simulation results show superior performance of the proposed approach in the underwater environment compared to existing systems