A study on performance of dynamic file replication algorithms for real-time file access in Data Grids
A study on performance of dynamic file replication algorithms for real-time file access in Data Grids
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DOI：
10.1016/j.future.2009.02.002
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发表时间：
2009-09
期刊：
影响因子：
--
通讯作者：
A. Doğan
中科院分区：
文献类型：
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作者：
A. Doğan
实时网格应用正在许多科学和工程学科中出现。为了在运行这些应用程序的同时满足与它们相关的实时约束，网格基础设施的设计应该尊重这些约束，并相应地分配其计算、网络、存储和其他资源。此外，这些应用程序涉及大量数据密集型作业，需要实时访问数tb的数据。另一方面，为了减少作业完成时间和节省网络带宽，针对尽力而为的数据网格环境提出了各种动态文件复制算法。到目前为止，文献中还没有研究试图阐述这些动态文件复制算法的实时性。基于这一动机，本研究在不同的数据网格设置下评估了八种动态复制算法的性能。为此，开发了一个面向过程的离散事件驱动模拟器DGridSim。使用DGridSim进行了详细的仿真研究，并给出了结果，以揭示动态文件复制算法的实时性。
Real-time Grid applications are emerging in many disciplines of science and engineering. In order to run these applications while meeting the associated real-time constraints with them, the Grid infrastructure should be designed to respect these constraints and allocate its computing, networking, storage, and the other resources accordingly. Furthermore, these applications involve a large number of data intensive jobs and require to access terabytes of data in real-time. On the other hand, a variety of dynamic file replication algorithms were proposed for the best-effort Data Grid environments in an attempt to decrease job completion times and save network bandwidth. Until now, there is no study in the literature which tries to elaborate on the real-time performance of these dynamic file replication algorithms. Based on this motivation, in this study, the performance of eight dynamic replication algorithms are evaluated under various Data Grid settings. For this evaluation, a process oriented and discrete-event driven simulator called DGridSim is developed. A detailed set of simulation studies are conducted using DGridSim and the results obtained are presented to reveal the real-time performance of the dynamic file replication algorithms.