A Stream Tilling Approach to Surface Area Estimation for Large Scale Spatial Data in a Shared Memory System
A Stream Tilling Approach to Surface Area Estimation for Large Scale Spatial Data in a Shared Memory System
复制标题
共享内存系统中大规模空间数据表面积估计的流耕方法
DOI:
10.1515/geo-2017-0047
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发表时间:
2017-12
期刊:
影响因子:
2
通讯作者:
徐胜华
中科院分区:
文献类型:
--
作者:
刘纪平;亢晓琛;董春;徐胜华
Surface area estimation is a widely used tool for resource evaluation in the physical world. When processing large scale spatial data, the input/output (I/O) can easily become the bottleneck in parallelizing the algorithm due to the limited physical memory resources and the very slow disk transfer rate. In this paper, we proposed a stream tilling approach to surface area estimation that first decomposed a spatial data set into tiles with topological expansions. With these tiles, the one-to-one mapping relationship between the input and the computing process was broken. Then, we realized a streaming framework towards the scheduling of the I/O processes and computing units. Herein, each computing unit encapsulated a same copy of the estimation algorithm, and multiple asynchronous computing units could work individually in parallel. Finally, the performed experiment demonstrated that our stream tilling estimation can efficiently alleviate the heavy pressures from the I/O-bound work, and the measured speedup after being optimized have greatly outperformed the directly parallel versions in shared memory systems with multi-core processors.
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DOI:
10.1080/13658816.2016.1162795
发表时间:
2016-11
影响因子:
5.7
作者:
Xue Shuqiang;Dang Yamin;Liu Jiping;Mi jinzhong;Dong Chun
通讯作者:
Dong Chun
DOI:
10.3138/q722-7681-3k17-jr08
发表时间:
1984-10
期刊:
Cartographica: The International Journal for Geographic Information and Geovisualization
影响因子:
--
作者:
W. R. Franklin
通讯作者:
W. R. Franklin
影响因子:
1.6
作者:
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DOI:
10.1145/356770.356776
发表时间:
1979-01-01
期刊:
COMPUTING SURVEYS
影响因子:
--
作者:
COMER, D
通讯作者:
COMER, D
影响因子:
4.4
作者:
Guan, Xuefeng;Wu, Huayi
通讯作者:
Wu, Huayi