tailieunhanh - Báo cáo hóa học: " Research Article Efficient Reduction of Access Latency through Object Correlations in Virtual Environments"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Efficient Reduction of Access Latency through Object Correlations in Virtual Environments | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 10289 19 pages doi 2007 10289 Research Article Efficient Reduction of Access Latency through Object Correlations in Virtual Environments Shao-Shin Hung and Damon Shing-Min Liu Department of Computer Science and Information Engineering National Chung Cheng University Chia-Yi 62107 Taiwan Received 1 September 2006 Accepted 22 February 2007 Recommended by Ebroul Izquierdo Object correlations are common semantic patterns in virtual environments. They can be exploited to improve the effectiveness of storage caching prefetching data layout and disk scheduling. However we have little approaches for discovering object correlations in VE to improve the performance of storage systems. Being an interactive feedback-driven paradigm it is critical that the user receives responses to his navigation requests with little or no time lag. Therefore we propose a class of view-based projectiongeneration method for mining various frequent sequential traversal patterns in the virtual environments. The frequent sequential traversal patterns are used to predict the user navigation behavior and through clustering scheme help to reduce disk access time with proper patterns placement into disk blocks. Finally the effectiveness of these schemes is shown through simulation to demonstrate how these proposed techniques not only significantly cut down disk access time but also enhance the accuracy of data prefetching. Copyright 2007 . Hung and D. . Liu. This is an open access article distributed underthe Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION With ever-increasing demands for storing very large volumes of data for applications such as telemedicine online computer entertainment systems and other large multimedia repositories large amounts of live .