CHAPTER 1: Introducing Database System LEARNING OUTCOMES TOPIC At the end of this chapter‚ students should be able to: DATABASE CONCEPT BSIT 201 Explain what is data management Differentiate manual file system and computerised file system with database system INTRODUCING DATABASE SYSTEM CHAPTER 1 Define database system‚ database and database management system List the functions‚ advantages and disadvantages of database management system PREPARED BY: YEW CHERN
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Database Models and Legacy Systems The evolution of the information age demanded robust management systems for storing large volume of data‚ efficiency in retrieval‚ and enhanced data security and sharing; hence‚ the development of databases from flat file systems. Despite this advancement in technology‚ many organizations such as Colorado Financial Reporting System (COFRS) continue to use legacy database systems. Colorado Financial Reporting System (COFRS) The Colorado Financial Reporting
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fault tolerance‚ and automatic recovery must be integral to the system. Second‚ files are huge by traditional standards. Multi-GB files are common. As a result‚ design assumptions and parameters such as I/O operation and blocksizes have to be revisited. Third‚ most files are mutated by appending new data rather than overwriting existing data. Random writes within a file are practically non-existent.Given this access pattern on huge files‚ appending becomes the focus of performance optimization and
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Unix File Access POS/355 UNIX® is provides security to directory and the file system. For security reason a file or directory has assigned permissions to use them and every user in the UNIX system is assigned set of permission while creating user account. Before going to discuss the file permission‚ let’s discuss the user account types in the UNIX. There are three types of user accounts on a UNIX system that are root account‚ system account and normal user account. Root account: It is a
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INTRODUCTION Education is a process wherein a child learns something new and progressive and it is important factor in a child development. This will help them to prepare for the near future. Pre School is extremely beneficial for early childhood development. It provides both an academic and social foundation that can give a child leg- up in future scholastic areas children during the preschool years are growing so fast and have the ability to learn and grown in leaps and bounds. A quality preschool
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ITC6000 – Assignment 1 Solution Question -1 Solution a) How many records does this file contain? 13 b) How many fields are there per record? 8 c) What are the field names? First‚ Last Name‚ ID‚ Hours‚ GrossPay‚ Withholding‚ NetPay‚ PayDate d) What problem(s) would you encounter if you tried to create a listing by last name? There are multiple records having the same last name. This is data redundancy e) What other problems do you see? The NetPay amount is a calculated value
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The Google File System The Google File System Sanjay Ghemawat‚ Howard Gobioff‚ and Shun-Tak Leung Google Niek Linnenbank Faculty of Science Vrije universiteit nlk800@few.vu.nl March 17‚ 2010 The Google File System Outline 1 Introduction 2 Architecture 3 Measurements 4 Latest Work 5 Conclusion The Google File System Introduction Size of the Internet 6‚767‚805‚208 people on earth 1‚733‚993‚741 people on the internet 5‚000‚000 terabytes of data (Eric Schmidt‚ 2005) The
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prescribed book Chapters 1 - 3: Chapter 5: Chapter 6: Chapter 7: Chapter 12: Chapter 14: Chapter 16: Revise as for Assignment 01 Entity relationship modelling Advanced data modelling Normalisation of database tables Transaction management and concurrency control Distributed database management systems Database connectivity and web development Question 1 What is a composite entity‚ and when is it used? [4 marks] [8 marks] Question 2 Briefly‚ but precisely‚ explain the difference between single-valued
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marks reduction): 11th August 2014 Assignment Topic Consider the following scenario. Dinuki Hire firm is a small family business that stocks general equipment such as garden tools‚ car maintenance tools etc. for hiring to its customers. A database system is required to simplify management of the business and to provide some financial information and maintaining stocks. Equipment’s are classified under various categories. Equipment’s are of different brands within each category. Brands are varies
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2. Why was the consolidated watch list created? What are the benefits of the list? ANSWER: In the aftermath of the 9-11 attacks‚ both critics and defenders of the information systems employed by the US intelligence community became concerned on how to prevent future terrorist incidents. Then a database of suspected terrorist known as the consolidated watch list was born. It is created in order to maintain separate list about terrorist and share relevant information concerning the individuals on
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