'B trees' diaporamas de présentation

CSE 332 Data Abstractions : B Trees and Hash Tables Make a Complete Breakfast

1.34k views • 125 slides

INDEXING AND HASHING

INDEXING AND HASHING. Basic Concepts. Index: an ordered list of words or phrases used for easy access to desired information or data . Indexing mechanisms are used for quick access to desired information or data. Example: author/title catalog in a Library .

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Flashing Up the Storage Layer I. Koltsidas, S. D. Viglas (U of Edinburgh), VLDB 2008

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CS4432: Database Systems II

CS4432: Database Systems II. Index definition in SQL. Create index name on rel (attr) (Check online for index definitions in SQL). Drop INDEX name. Note. ATTRIBUTE LIST ? MULTIKEY INDEX e.g., CREATE INDEX foo ON R(A,B,C). Multi-key Index. Motivation: Find records where

528 views • 31 slides

Yun Wen

FYTG 5101 Presentation Data Management For Spatio -temporal Data Of PM 2.5 Indices Through Mobile Sensing Type of This Project: Survey. Yun Wen. Outlines. Motivation ST Concepts and Models Storage Structure and Indexing. Reliable?. Project: Home Air Quality Sensor Network. CO, O 2 ,

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Optimizing RAM-latency Dominated Applications

Optimizing RAM-latency Dominated Applications. Yandong Mao , Cody Cutler, Robert Morris MIT CSAIL. RAM-latency may dominate performance. RAM-latency dominated applications follow long pointer chains working set >> on-chip cache A lot of cache misses -> stalling on RAM fetches

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CSE332: Data Abstractions Lecture 9: B Trees

CSE332: Data Abstractions Lecture 9: B Trees. Dan Grossman Spring 2012. Problem: A dictionary with so much data most of it is on disk Desire: A balanced tree (logarithmic height) that is even shallower than AVL trees so that we can minimize disk accesses and exploit disk-block size

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Algorithms, Design and Analysis

Algorithms, Design and Analysis. Transform and Conquer Algorithms Presorting HeapSort. Transform and Conquer. Solve problem by transforming into: a more convenient instance of the same problem ( instance simplification ) presorting Gaussian elimination

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Variational Algorithms for Marginal MAP

Variational Algorithms for Marginal MAP. Qiang Liu Alexander Ihler Department of Computer Science, University of California, Irvine. Variational Approximations. Abstract.

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