1 / 17

CS541 Database Systems

CS541 Database Systems. CS 541 Lecture Slides Sunil Prabhakar. Instructor. Sunil Prabhakar LWSN 2142C Office Hours: catch me or by appointment sunil@cs.purdue.edu http://www.cs.purdue.edu/homes/sunil/ Teaching Assistant: Yasin Silva ysilva@cs.purdue.edu Office hours: TBA

jillian-foley
Télécharger la présentation

CS541 Database Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CS541 Database Systems CS 541 Lecture Slides Sunil Prabhakar

  2. Instructor • Sunil Prabhakar • LWSN 2142C • Office Hours: catch me or by appointment • sunil@cs.purdue.edu • http://www.cs.purdue.edu/homes/sunil/ • Teaching Assistant: Yasin Silva • ysilva@cs.purdue.edu • Office hours: TBA • Assignments and Projects Sunil Prabhakar

  3. Course Information • Web page: • http://www.cs.purdue.edu/homes/sunil/syllabi/CS541_Fall2004.html • Projects, Assignments, Solutions, Slides • Email alias • Announcements: IMPORTANT • cs541@cs.purdue.edu • mailer add me to cs541 • WebCT • Grades • Check that you can log in Sunil Prabhakar

  4. Course Description • Introductory graduate course on databases • Fundamental concepts & internals • Some coverage of use of databases (Oracle projects) • Will not teach use of databases!!! • Focus on Relational Databases Sunil Prabhakar

  5. Topics • DBMS Concepts and Architecture • Relational Database Model • Relational Languages (Algebra, Calculus, SQL) • Storage and Indexing • Query Processing • Query Optimization • Transaction Processing • Concurrency Control • Recovery • Advanced Topics: TBD (Mining, Indexing, Sensors, …) Sunil Prabhakar

  6. Pre-Requisites • Data Structures • Notions of trees, hashing, linked lists etc. • Operating Systems • I/O • Java • Project 3 will be done in Java • RMI • Simple GUI Sunil Prabhakar

  7. Text • Database System Concepts (4th Edition) • Silberschatz, Korth, Sudarshan • ISBN: 0-07-228363-7 • McGraw Hill • Supplemental Text: • Concurrency Control and Recovery in Database Systems • Bernstein, Hadzilacos, Goodman. • Out of Print: Avaliable free on the Internet • Link from course web page. Sunil Prabhakar

  8. Grading Policy • Tentative • Written Assignments (2) 20% • Programming Projects (3-4) 40% • Mid-term Exam 20% • Final Exam 20% • Final not comprehensive • Grading is curved • No extra credit assignments Sunil Prabhakar

  9. Academic Integrity • CS Policy • IMPORTANT: visit, read and accept!!! • https://portals.cs.purdue.edu/student • Need CS login and password. • Cheating will be taken very seriously. • Make sure that you are familiar with what CS considers to be cheating!! • You may discuss the problems, but the final solution must be your own. Sunil Prabhakar

  10. Course Policy • NO LATE SUBMISSIONS • NO LATE SUBMISSIONS • NO EXTENSIONS • NO EXTENSIONS *** Only on Documented Medical Reasons or Family emergency. Sunil Prabhakar

  11. Databases • What is a database? • S/w to manage data. • Why do we need a database? • Ease of development, • Efficiency • Concurrency • Reliability • Ease of administration • Data independence • Importance of databases? • Increasing or decreasing? What is changing? Sunil Prabhakar

  12. What is interesting? • Essential to modern applications? • Data is a valuable commodity. • Is there anything challenging? • Encompass PL, OS, Logic, Theory, … • Novel solutions with wider applicability: Transactions, Locking, … • What remains to be done? • Modern applications: Multimedia, Sensors, Streams, Data Warehouses, Data Mining, Privacy and Security, Knowledge, Data on the Web, XML, …. Sunil Prabhakar

  13. Abstraction • How to provide a generic, application-independent solution? • Data Models • Abstract view of data • Database efficiently supports this model • Examples: Network, Relational, OO, O-R, … • Most successful model: RELATIONAL • Users access the database as a black box that supports the model. • Languages are used to interact with this Box: • Relational Algebra, SQL, Sunil Prabhakar

  14. Independence • Databases allow applications and users to be shielded from the internal details: • Physical data independence • How data is stored (bits, pages, formats, etc.) • Compare with Flat file alternative • Logical data independence • How data is structured logically. • Allows applications to make changes to the logical organization of data without have to rebuild applications Sunil Prabhakar

  15. Concurrency Control & Recovery • Two highly desirable requirements: • Enable multiple users to access the data at the same time. • Automatic recovery from crashes. • Challenge: • How to do this in an application-independent manner? • Solution: • Transactions • “Contract” between the DB Black Box and users. Sunil Prabhakar

  16. Performance • Critical for databases • Research focus for many years • Must be transparent to the users • Query processing & Optimization • Indexing, storage organization (data independence) • Challenge: • How to optimize without understanding the semantics of an application? • Solution: • Relation data model -- clean mathematical abstraction, allows for alternative equivalent evaluations Sunil Prabhakar

  17. This course • Study the relational model, ER model, languages. • Transactions • Concurrency Control • Recovery • Storage and File Structures • Indexing and Hashing • Query Processing and Optimization • Advanced Topics • New data types, applications, multi-dimensional data, data warehousing, data mining, design, … Sunil Prabhakar

More Related