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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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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Chapter 9b: Buffer Pool Management CPSC 404, Fall 2020 Based on: Sections 9.4, 9.41, and 16.7.1 to 16.7.4 of our textbook: Ramakrishnan, Raghu and Gehrke, Johannes. Database Management Systems. McGraw-Hill, 2003. Silberschatz, Abraham; Galvin, Peter Baer; and Gagne, Greg. Operating System Concepts, Wiley, 2002. 1 Learning Goals Explain the purpose of a DBMS buffer
Module Information Summary Module Description – General Module Code Module Name Year Level (Module) Credit Value Semester(s) Oered Copyright By PowCoder代写 加微信 powcoder Module Leader ITS62904 Database Systems 1 March August Students are introduced to understand the fundamental approaches and concepts. The learning and teaching approach for the module will include understanding the basics of
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Model-Checking CS511 1/76 Program Correctness Model-Checking Introduction to Promela Assertion Based Model Checking Turnstile Example MEP End States 2/76 Program Correctness Main approaches to demonstrating that a program does what it’s supposed to do: 1. Testing 2. Deductive verification 3. Model-checking 3/76 Testing Fast and simple way to detect errors Can never be
Communication Patterns CS511 1/37 Client Server Architecture A Generic Server Concurrency Patterns 2/37 Client-Server Architecture Common asynchronous communication pattern For example: a web server handles requests for web pages from clients (web browsers) Server {result,Data} {request,Data} Client Client Client 3/37 Example: Factorial Server 1 2 3 4 5 6 7 8 9 10
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Monitors CS511 1/47 Review We’ve seen that semaphores are an efficient tool to solve synchronization problems However, they have some drawbacks 1. They are low-level constructs It is easy to forget an acquire or release 2. They are not related to the data They can appear in any part of the
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CS157A: Introduction to Database Management Systems Transactions Suneuy Kim 1 Terminology • A transaction groups a set of operations that transform the database from one consistent state to another. • Transaction processing system – Systems with large databases and hundreds of concurrent users executing database transactions. 2 Motivations • Concurrency control: Serializablity of concurrent access
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CS157A: Introduction to Database Management Systems JDBC (Java DataBase Connectivity) Suneuy Kim 1 JDBC • http://docs.oracle.com/javase/8/docs/technot es/guides/jdbc/ • JDBC API : The industry standard for database- independent connectivity between Java and a SQL database – Establish a connection with a database or access any tabular data source – Send SQL statements – Process the results
CS157A: Introduction to Database Management Systems Chapter 1: Introduction Chapter 2: The Relational Model of Data Suneuy Kim CS157A: Chapter 2 1 I. Database Management System (DBMS) • Database is a collection of data that is managed by a DBMS. • DBMS is specially designed software applications that interact with the user, other applications, and