As storage systems scale from a few storage nodes to hundreds or thousands, data distribution and load balancing become increasingly important. We present a novel decentralized algorithm, rdIM (Replication Under Dynam...
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This paper presents a lock-free parallel algorithm for garbage collection in a realistic model using synchronization primitives offered by machine architectures. Mutators and collectors can simultaneously operate on t...
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This paper presents a novel trust model in which we model trust based on an exotic uncertainty theory, namely cloud model. We regard trust between entities as a cloud that is called as trust cloud. Based on such a qua...
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This article presents a method for evaluating the CPU power, independently from the system used, in heterogeneous networks of work stations. It is based on the use of Java language in order to ensure application porta...
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ISBN:
(纸本)0769522106
This article presents a method for evaluating the CPU power, independently from the system used, in heterogeneous networks of work stations. It is based on the use of Java language in order to ensure application portability and more particularly on the mechanism of thread CPU processing time measurement introduced in the version 1.5 of Sun Java. That tool will be integrated into the load balancing mechanism which is totally written in Java and that we developed in the LIFL project ADAJ. We show how to evaluate the potential power of the CPU with a software totally written in Java. Moreover, we will justify the results provided by our approach. We will also analyse the exploitation of the calibration tool in order to improve the execution time of parallel and distributedapplications in the context of load balancing in a network of workstations.
Today many current and emerging applications require support for on-line analysis of rapidly changing data streams. Limitations of traditional DBMSs in supporting streaming applications have been recognized, prompting...
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This paper discusses a parallel quicksort algorithm that is cost optimal, in average, using O(n/log(n)) processors. The cost optimality is mainly due to a cost optimal partitioning algorithm that utilizes all the proc...
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The consistency models are responsible for managing the state of shared data for the applications of a distributed shared memory (DSM) systems. The already proposed consistency models are inflexible and cannot adapt t...
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In this paper, we investigate the recent popular computing technique called Grid Computing, and use video conversion and 3D rendering applications to demonstrate this technology39;s effectiveness and high performanc...
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For communication-intensive parallelapplications, the maximum degree of concurrency achievable is limited by the communication throughput made available by the network. In previous work, we showed experimentally that...
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For communication-intensive parallelapplications, the maximum degree of concurrency achievable is limited by the communication throughput made available by the network. In previous work, we showed experimentally that the performance of certain parallelapplications running on a workstation network can be improved significantly if a congestion control protocol is used to enhance network performance. In this paper, we characterize and analyze the communication requirements of a large class of supercomputing applications that fall under the category of fixed-point problems, amenable to solution by parallel iterative methods. This results in a set of interface and architectural features sufficient for the efficient implementation of the applications over a large-scale distributed system. In particular, we propose a direct link between the application and network layer, supporting congestion control actions at both ends. This in turn enhances the system's responsiveness to network congestion, improving performance. Measurements are given showing the efficacy of our scheme to support large-scale parallel computations.
Grid computing virtualizes heterogeneous geographically disperse resources. Because of the characteristics of the grid environment, the concept of 39;user39; is different from that of traditional local computing e...
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