Constrained Skyline Query Processing against Distributed Data Sites

doi:10.1109/TKDE.2010.103

CORC > 北京大学 > 信息科学技术学院

	Constrained Skyline Query Processing against Distributed Data Sites
	Chen, Lijiang ; Cui, Bin ; Lu, Hua
刊名	ieee知识与数据工程汇刊
	2011
关键词	Constrained skyline query filtering point distributed query processing DATABASES
DOI	10.1109/TKDE.2010.103
英文摘要	The skyline of a multidimensional point set is a subset of interesting points that are not dominated by others. In this paper, we investigate constrained skyline queries in a large-scale unstructured distributed environment, where relevant data are distributed among geographically scattered sites. We first propose a partition algorithm that divides all data sites into incomparable groups such that the skyline computations in all groups can be parallelized without changing the final result. We then develop a novel algorithm framework called PaDSkyline for parallel skyline query processing among partitioned site groups. We also employ intragroup optimization and multifiltering technique to improve the skyline query processes within each group. In particular, multiple (local) skyline points are sent together with the query as filtering points, which help identify unqualified local skyline points early on a data site. In this way, the amount of data to be transmitted via network connections is reduced, and thus, the overall query response time is shortened further. Cost models and heuristics are proposed to guide the selection of a given number of filtering points from a superset. A cost-efficient model is developed to determine how many filtering points to use for a particular data site. The results of an extensive experimental study demonstrate that our proposals are effective and efficient.; Computer Science, Artificial Intelligence; Computer Science, Information Systems; Engineering, Electrical & Electronic; SCI(E); EI; 8; ARTICLE; 2; 204-217; 23
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/152687]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Chen, Lijiang,Cui, Bin,Lu, Hua. Constrained Skyline Query Processing against Distributed Data Sites[J]. ieee知识与数据工程汇刊,2011.
APA	Chen, Lijiang,Cui, Bin,&Lu, Hua.(2011).Constrained Skyline Query Processing against Distributed Data Sites.ieee知识与数据工程汇刊.
MLA	Chen, Lijiang,et al."Constrained Skyline Query Processing against Distributed Data Sites".ieee知识与数据工程汇刊 (2011).