PPT-Tree-based Indexing

Hessam Zakerzadeh ISAM Indexed Sequential Access Method Static index structure Effective when file is not frequently updated Data values reside in leaf nodes Leaf pages contain data entries. Marjorie M K Hlava, President. Access Innovations, Inc.. Albuquerque, NM. +1-505-998-0800. www.accessinn.com. www.dataharmony.com. mhlava@accessinn.com. 1. Subject metadata. 2. 3. 4. 5. 6. 7. 8. 9. Indexing Legacy Content. BioASQ. Workshop. September 27, 2013. Alan R. Aronson. Lister Hill Center, US National Library of Medicine. alan@nlm.nih.gov. The views and opinions expressed do not necessarily state or reflect those of the U.S. Government, and they may not be used for advertising or product endorsement purposes.. --Presented By . Sudheer. . Chelluboina. .. Professor: . Dr.Maggie. Dunham. Contents . Outline of Paper. Introduction . Index Structures. Due to rapid increase in the use of location based services applications, large amount of location data of moving object is recorded. Because of that efficient indexing techniques are required to manage these large amounts of trajectory data. All index structures are focused on either indexing past, current and future locations. Every indexing structure or techniques discussed in this paper will make simpler indexing or it will increase the overall query processing performance. . School of Computing. National University of Singapore. Department of Computer Science. Aalborg. University. Meihui. Zhang. , Su Chen, Christian S. Jensen, . Beng. Chin . Ooi. , . Zhenjie. Zhang. School of Computing. National University of Singapore. Department of Computer Science. Aalborg. University. Meihui. Zhang. , Su Chen, Christian S. Jensen, . Beng. Chin . Ooi. , . Zhenjie. Zhang. Database System Implementation CSE 507. Some slides . adapted from R. . Elmasri. and S. . Navathe. , Fundamentals of Database Systems. , Sixth . Edition, . Pearson.. And . Silberschatz. , . Korth. and . Goals:. Store large files. Support multiple search keys. Support efficient insert, delete, and range queries. 2. Files and Indexing. Entry sequenced file. : Order records by time of insertion.. Search with sequential search. Database System Implementation CSE 507. Some slides adapted from R. . Elmasri. and S. . Navathe. , Fundamentals of Database Systems. , Sixth Edition, Pearson.. And . Silberschatz. , . Korth. and . Sudarshan. Introduction to Spatial Computing CSE 5ISC. Some slides . adapted from Spatial Databases. : A Tour by Shashi . Shekhar. Prentice Hall (2003). Quadtrees. and its Variants . Region . Quadtrees. Some slides borrowed from “GIS a computational perspective: second edition” by M. . with Simultaneous Properties. Qingzhou. Luo, Yi Zhang, . Choonghwan. Lee, . Dongyun. . Jin. , Patrick O’Neil . Meredith, . Traian. . Florin . Serbanuta. and Grigore . Rosu. University of Illinois at Urbana-Champaign. Current Status and Role in Improving Access. to Biomedical Information. A Report to the Board of Scientific Counselors. April 5, 2012. Alan R. Aronson . (Principal Investigator). James G. . Mork. Ke. Deng, . Kexin. . Xie. , Kevin . Zheng. and . Xiaofang. Zhou. 9/06/2016. 1. 2. Chapter Overview. Trajectory Query Classification. Trajectory Similarity Measure. Trajectory Data Index. Trajectory Query Processing. Basic Concepts. Ordered Indices . B. +. -Tree Index Files. B-Tree Index Files. Hashing. Write-optimized indices . Spatio. -Temporal Indexing. Basic Concepts. Indexing mechanisms used to speed up access to desired data.. Bloom Filters. A . bloom filter. . is a probabilistic data structure used to check membership of a value in a set. May return true (with low probability) even if an element is not present. But never returns false if an element is present.