Mobile Computing COMP5216 Week 04 Semester 2, 2020 Dr. Kanchana Thilakarathna School of Computer Science The University of Sydney Page 1 Announcements – It’s great that you are talking…! – What should be in the proposal? – App: background, related work, significance, requirements, and etc; – Solution: explain how you are going to implement your […]
Concurrency Control Ed Knorr, Slides from Fall 2020, CPSC 404 Based on: Chapter 17 of Ramakrishnan & Gehrke (textbook), but building on the content of Chapter 16, with some notes from George Tsiknis. 1 Learning Goals Explain why a serializable schedule is often a desirable schedule. Given a set of transactions, determine whether
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Query Evaluation & Query Optimization Ed Knorr, Fall 2020 Chapters 12 & 14 Combined (Part 1 of 2) Based on: Ramakrishnan & Gehrke (textbook): (a) Introduction to Chapter 12 and Sections 12.1 & 12.2 on pages 393-400; (b) Introduction to Chapter 14 and Section 14.1 on pages 439-444; and (c) Sections 14.4-14.4.1 on pages 452-458.
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Systems: The Complete Book. Pearson, 2009. CPSC 404 Chapter 9a: Disk Storage Fall 2020 Based on: • Ramakrishnan, Raghu and Gehrke, Johannes. Database Management Systems. McGraw-Hill, 2003. (i.e., our textbook, pp. 304-309) • Garcia-Molina, Hector; Ullman, Jeffrey; and Widom, Jennifer. Database • Mullins, Craig. Database Administration. Addison-Wesley, 2013. • Bryant, Randall and O’Hallaron, David. Computer
3-16. ARTIFICIAL INTELLIGENCE 1. The International Sport Board (ISB) has regulations which specify whether or not a player is eligible to play Sport for a particular country. One regulation states that a player is eligible to play for a country if: The player was born in the country, or Either of the player’s parents were
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Chapter 10: Tree-Structured Indexes (with a Focus on B+ Trees) Ed Knorr, Slides from Fall 2020 Based on: • Sections 10.1, 10.3-10.8.4 of Ramakrishnan & Gehrke (textbook)—i.e., basically all of Chapter 10, but skip the parts about ISAM indexes. • Sections 8.1, 8.2, and 8.2.1 – Read or re-read this part of the textbook if
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Crash Recovery and the ARIES Algorithm Ed Knorr, Slides from Fall 2020, CPSC 404 Based on most of Chapter 18 in: Ramakrishnan & Gehrke (textbook) 1 Learning Goals Explain the purpose of write-ahead logging. Explain the purpose of these types of log records in the ARIES algorithm: update, commit, abort, end, and compensation.
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CS5481 Data Engineering Tutorial 1 SQL versus relational algebra 1. Most of the databases nowadays are relational databases. 2. To make data available to users, the most important issue in databases is how users specify requests for retrieving data. 3. The SQL language is the most widely used query language today. 4. The relational algebra
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Column name DBNAME TSNAME DSNUM ICTYPE | | | Data type CHAR(8) NOT NULL CHAR(8) NOT NULL INTEGER NOT NULL CHAR(1) NOT NULL Description Use Name of the database. G Name of the target table space or index space. G Data set number within the table space. For partitioned G table spaces, this value corresponds
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CS5481 Data Engineering Tutorial 11 1. Consider the following two transactions. Assume that the two transactions preserve database consistency in isolation. T1: r1(A); w1(A); r1(B); w1(B); T2: r2(A); w2(A); r2(B); w2(B); Give all possible schedules (including serial schedule) of the two transactions that are conflict‐equivalent to the serial schedule (T1, T2). r1(A)w1(A)r1(B)w1(B)r2(A)w2(A)r2(B)w2(B) r1(A)w1(A)r1(B)r2(A) w1(B)w2(A)r2(B)w2(B) r1(A)w1(A)r2(A)r1(B)w1(B)w2(A)r2(B)w2(B)
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