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Advanced Data Structures NTUA Spring 2007 B+-trees and External memory Hashing

Advanced Data Structures NTUA Spring 2007 B+-trees and External memory Hashing

Advanced Data Structures NTUA Spring 2007 B+-trees and External memory Hashing. Model of Computation. Data stored on disk(s) Minimum transfer unit: a page(or block) = b bytes or B records N records -> N/B = n pages I/O complexity: in number of pages. CPU. Memory. Disk.

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596 views • 47 slides
B+-Trees and Hashing Techniques for Storage and Index Structures

B+-Trees and Hashing Techniques for Storage and Index Structures

B+-Trees and Hashing Techniques for Storage and Index Structures. Rizwan Rehman Centre For Computer Studies Dibrugarh University. Alternative File Organizations. Many alternatives exist, each ideal for some situation , and not so good in others:

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460 views • 35 slides
Indexing

Indexing

Indexing. February 28 th , 2003 Lecture 20. Review. What is index? Compare with primary key Why do we need index? Alternative for data entry k* in index? Data record with key value k < k , rid of data record with search key value k >

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409 views • 32 slides
Tree-Structured Indexes

Tree-Structured Indexes

Tree-Structured Indexes. Chapter 9. Introduction. As for any index, 3 alternatives for data entries k* : Data record with key value k < k , rid of data record with search key value k > < k , list of rids of data records with search key k >

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167 views • 16 slides
B+Trees

B+Trees

B+Trees. Introduction. As for any index, 3 alternatives for data entries k* : Data record with key value k (not really an index) < k , rid of data record with search key value k > < k , list of rids of data records with search key k >

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165 views • 16 slides
B+-trees

B+-trees

B+-trees. Model of Computation. CPU. Memory. Data stored on disk(s) Minimum transfer unit: a page = b bytes or B records (or block) N records -> N/B = n pages I/O complexity: in number of pages. Disk. I/O complexity.

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224 views • 14 slides

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