NDLI: Spatial indexing of distributed multidimensional datasets

Content Provider	IEEE Xplore Digital Library
Author	Nam, B. Sussman, A.
Copyright Year	2005
Description	Author affiliation: Dept. of Comput. Sci., Maryland Univ., College Park, MD, USA (Nam, B.; Sussman, A.)
Abstract	While declustering methods for distributed multidimensional indexing of large datasets have been researched widely in the past, replication techniques for multidimensional indexes have not been investigated deeply. In general, a centralized index server may become the performance bottleneck in a wide area network rather than the data servers, since the index is likely to be accessed more often than any of the datasets in the servers. In this paper, we present two different multidimensional indexing algorithms for a distributed environment - a centralized global index and a two-level hierarchical index. Our experimental results show that the centralized scheme does not scale well for either insertion or searching the index. In order to improve the scalability of the index server, we have employed a replication protocol for both the centralized and two-level index schemes that allows some inconsistency between replicas without affecting correctness. Our experiments show that the two-level hierarchical index scheme shows better scalability for both building and searching the index than the non-replicated centralized index, but replication can make the centralized index faster than the two-level hierarchical index for searching in some cases.
Starting Page	743
Ending Page	750
File Size	1888954
Page Count	8
File Format	PDF
ISBN	0780390741
DOI	10.1109/CCGRID.2005.1558637
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-05-09
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Indexing Multidimensional systems Network servers File servers Computer science Educational institutions Wide area networks Scalability Sensor systems Large-scale systems
Content Type	Text

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