| 二维瓦片矢量基对二次映射分布方法 |
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| 引用本文： | 李忠民,高路. 二维瓦片矢量基对二次映射分布方法[J]. 计算机工程与应用, 2010, 46(10): 20-22. DOI: 10.3778/j.issn.1002-8331.2010.10.007 |
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| 作者姓名： | 李忠民 高路 |
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| 作者单位： | 南昌航空大学信息工程学院,南昌,330063;武汉大学测绘遥感信息工程国家重点实验室,武汉,430079 |
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| 基金项目： | 国家重点基础研究发展规划(973)No.2004CB318206;;江西省教育厅青年科学基金项目No.GJJ10190~~ |
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| 摘 要： | 针对基于对象存储系统中各个存储设备的性能差异,提出了一种二维瓦片矢量基对二次映射分布方法。首先,构建一组性能相同、容量无限的虚拟设备,并根据矢量基对分布模板将二维瓦片分布到M个虚拟设备中;然后,通过伪随机数发生器将M个虚拟设备中的瓦片均匀映射到[0,1）区间的M个等分区间;最后,根据真实设备的瓦片分布百分比将[0,1）区间划分成M个区间,并将映射到各个区间的二维瓦片分布到对应的真实设备中。
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| 关 键 词： | 二维瓦片 矢量基对 虚拟设备 基于对象存储 |
| 收稿时间： | 2009-11-30 |
| 修稿时间： | 2010-2-23 |
2-D tiles pair of base vectors twice mapping declustering method |
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| LI Zhong-min,GAO Lu.School of Information Engineering,Nanchang Hangkong University,Nanchang ,China .State Key Laboratory of Information Engineering in Surveying,Mapping , Remote Sensing,Wuhan University,Wuhan ,China. 2-D tiles pair of base vectors twice mapping declustering method[J]. Computer Engineering and Applications, 2010, 46(10): 20-22. DOI: 10.3778/j.issn.1002-8331.2010.10.007 |
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| Authors: | LI Zhong-min GAO Lu.School of Information Engineering Nanchang Hangkong University Nanchang China .State Key Laboratory of Information Engineering in Surveying Mapping Remote Sensing Wuhan University Wuhan China |
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| Affiliation: | LI Zhong-min1,GAO Lu21.School of Information Engineering,Nanchang Hangkong University,Nanchang 330063,China 2.State Key Laboratory of Information Engineering in Surveying,Mapping , Remote Sensing,Wuhan University,Wuhan 430079,China |
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| Abstract: | Aiming at the performance difference of real storage devices in object-based storage system,a 2-D tiles pair of base vectors twice mapping declustering method based on virtual device is proposed.Firstly,a group of virtual devices which have same storage performance and non-limited capacity is constructed,then the tiles are distributed into M virtual devices according to the distribution model of 2-D tiles pair of base vectors.Secondly,the tiles are equably mapped in M virtual devices into M equidis tant int... |
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| Keywords: | 2-D tiles pair of base vectors virtual device object-based storage |
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