'Overflow pages' presentation slideshows

Charter Renewal Made Easy

425 views • 31 slides

CPSC 461 Final Review I

CPSC 461 Final Review I. Hessam Zakerzadeh Dina Said. 9.1) What is the most important difference between a disk and a tape?. 9.1) What is the most important difference between a disk and a tape?

516 views • 25 slides

Hash-based Indexes

Hash-based Indexes. CS 186, Spring 2006 Lecture 7 R &G Chapter 11. HASH, x. There is no definition for this word -- nobody knows what hash is. Ambrose Bierce, "The Devil's Dictionary", 1911. Introduction. As for any index, 3 alternatives for data entries k* :

356 views • 25 slides

Database Systems ( ????? )

Database Systems ( ????? ). November 8, 2004 Lecture #9 By Hao-hua Chu ( ??? ). Announcement. Midterm exam: November 20 (Sat): 2:30 PM in CSIE 101/103 Assignment #6 is available on the course homepage. It is due on 11/24 It is very difficult Suggest you do it before midterm exam

445 views • 24 slides

Hashing

Hashing. B+ Tree: The Most Widely Used Index. Insert/delete at log F N cost; keep tree height-balanced . (F = fanout, N = # leaf pages) Minimum 50% occupancy (except for root). Each node contains

309 views • 23 slides

Hashing

Hashing. Selection Queries. B+-tree is perfect, but.... to answer a selection query (ssn=10) needs to traverse a full path. In practice, 3-4 block accesses (depending on the height of the tree, buffering) Any better approach?.

224 views • 22 slides

Instructor: Chen Li

CS 222P: Principles of Data Management Notes # 8 Static Hashing, Extendible Hashing ? Linear Hashing. Instructor: Chen Li. Introduction. Hash -based indexes are best for equality selections . Cannot support range searches.

511 views • 20 slides

CAS CS 460/660 Introduction to Database Systems Indexing: Hashing

CAS CS 460/660 Introduction to Database Systems Indexing: Hashing. Introduction. Hash -based indexes are best for equality selections . Cannot support range searches. Static and dynamic hashing techniques exist; trade-offs similar to ISAM vs. B+ trees .

154 views • 15 slides

Index tuning

Index tuning. Hash Index. Overview. Linear Hashing. This is another dynamic hashing scheme, an alternative to Extendible Hashing. LH handles the problem of long overflow chains without using a directory , and handles duplicates .

139 views • 13 slides