By Stefano Ceri, Piero Fraternali, Stefano Paraboschi (auth.), Carlo Zaniolo, Peter C. Lockemann, Marc H. Scholl, Torsten Grust (eds.)
EDBT 2000 is the 7th convention in a chain devoted to the development of database know-how. This year’s convention distinct subject, \Connect hundreds of thousands of clients and information Sources," underscores the significance of databases for the data age that's dawning with the recent millennium. the significance - rives not only from the statement that the data age primarily rests on theconvergenceofcommunications,computing,andstorage.Equallyimportant, the various techniques and methods underlying the good fortune of databasesystems have self sufficient which means and influence for today’s disbursed details s- tems. The papers within the quantity also needs to be visible during this gentle. The EDBT 2000 convention application contains 30 study papers chosen via this system committee out of 187 submissions, overlaying advances in study, improvement, and functions of databases. The convention software additionally - cludes six andapplications papers,a panel discussion,six tutorials,and a number of software program demonstrations. The convention beneficial properties 3 unusual - vited audio system: Ashish Gupta discusses database matters in digital trade, Stefano Ceri addresses the impression and demanding situations of XML on databases, and Andreas Reuter stocks his perspectives on new views on database know-how. The technical contributions offered on the EDBT 2000 convention are colle- ed and preserved during this quantity that we're happy to provide to you with the expectancy that it'll function a useful examine and reference software on your specialist life.
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Extra resources for Advances in Database Technology — EDBT 2000: 7th International Conference on Extending Database Technology Konstanz, Germany, March 27–31, 2000 Proceedings
The improvement potential was already shown in fig. 6. The intention of our next experiment is to show that the optimum is not merely a hardware constant but to a large extent dependent on the data to be indexed. For this purpose, we constructed a DABS-tree on several data files containing uniformly and independently distributed points of varying dimension. The number of objects was fixed in this experiment to 12,000. We observed the block size which was generated by the Dynamically Optimizing High-Dimensional Index Structures 250000 Optimum [Bytes] 250000 Optimum [Bytes] 47 200000 150000 100000 50000 0 200000 150000 100000 50000 0 0 4 8 12 16 0 Dimension 25000 50000 75000 100000 Number of Points Fig.
14 seconds of I/O time. 71 seconds. Both kinds of directory cost are negligible compared to 49 seconds of cost for accessing the data pages. Even though, the sequential scan of a linear directory causes fewer effort than a hierarchical directory. This observation even holds for fairly low dimensions. The data pages contain only data-specific information. Besides the point data and eventually some additional application-specific information, no management information is required. The data pages are stored in random order in the index file.
B¨ ohm, B. A. -P. Kriegel. Fast parallel similarity search in multimedia databases. In Proceedings of the ACM SIGMOD International Conference on Management of Data, pages 1–12, Tucson, USA, 1997. 5. S. A. -P. Kriegel. The X-tree: An index structure for high-dimensional data. In Proceedings of the International Conference on Very Large Databases (VLDB), pages 28–39, 1996. 6. K. Beyer, J. Goldstein, R. Ramakrishnan, and U. Shaft. When is “nearest neighbour” meaningful? In Catriel Beeri and Peter Buneman, editors, Proc.