1 Chapter 1 Database Systems Database Systems: Design‚ Implementation‚ and Management‚ Seventh Edition‚ Rob and Coronel 1 1 In this chapter‚ you will learn: • The difference between data and information • What a database is‚ what the different types of databases are‚ and why they are valuable assets for decision making • The importance of database design • How modern databases evolved from file systems Database Systems: Design‚ Implementation‚ & Management‚ 7th Edition‚ Rob
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File Management in lunix Operating System A very important part of your desktop environment is the file manager application‚ enabling you easily to create‚ access‚ and manage all files on your system. Traditional file management in Linux would have been done via the command lines‚ requiring some more advance knowledge of several commands to list‚ create‚ delete‚ or edit files and their properties. A file manager provides a graphical and more intuitive way in which it handles these tasks. The concept
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confidentiality of employee’s records. Specific Problem 1. Inefficient file management. Difficulty in locating files and some specific files cannot be found and causes inefficiency of service. 2. Inconsistency in generating on-time salary reports. Difficulty in generating on-time payroll reports that causes delay in releasing of salaries that leads to less productivity of employees. 3. Unsecured confidential files. Confidential files are not restricted thus causing it to be viewed by anyone who
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time-sharing environment‚ several users share the system simultaneously. This situation can result in various security problems. a. What are two such problems? b. Can we ensure the same degree of security in a time-shared machine as in a dedicated machine? Explain your answer? Ans1: (a) Stealing or copying a user ’s files; writing over another program ’s (belonging to another user or to the OS) area in memory; using system resources (CPU‚ disk space) without proper accounting;
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A1-R4: IT TOOLS AND BUSINESS SYSTEMS NOTE: 1. There are TWO PARTS in this Module/Paper. PART ONE contains FOUR questions and PART TWO contains FIVE questions. 2. PART ONE is to be answered in the TEAR-OFF ANSWER SHEET only‚ attached to the question paper‚ as per the instructions contained therein. PART ONE is NOT to be answered in the answer book. 3. Maximum time allotted for PART ONE is ONE HOUR. Answer book for PART TWO will be supplied at the table when the answer sheet for PART ONE is returned
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by the organization: File system Like all UNIX systems‚ its file system is based on one root directory‚ or hierarchical top point with subdirectories underneath it. Some sub-directories act as mount points‚ where different physical or networked file systems may be incorporated. The hardware is also incorporated into the file hierarchy. Device drivers interface to user applications via an entry in the /dev directory. Process information as well is mapped to the file system through the /proc directory
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2) Download “Eclipse IDE for C/C++ Developers”‚ either 32 or 64 bit depending on your OS. Step 3) Extract the ‘eclipse’ folder and make any shortcuts you would like. This folder is the installation directory‚ so if you want to move it to ‘Program Files’ on Windows or someplace equivalent on Mac/Linux‚ you have to do that manually. Step 4) Start Eclipse‚ create a ‘workspace’ (this is where your local projects/code gets saved) and hit ‘OK’. Step 5) Click the open workspace button: Step 6) In the menus
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Rosen@RosenLawFirm.com We have turned our litigation firm of two attorneys‚ a legal assistant‚ and a legal secretary into a completely digital firm and left all -- well‚ almost all -- paper behind. Our files are digital‚ our dictations are digital‚ all mail (except for junk mail) is scanned and stored as digital files‚ all documents to be produced are numbered electronically‚ all confidentiality logos on documents to be produced are stamped electronically‚ almost all documents are produced on CDs or DVDs
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3. Problem Formulation As it is evident from the related work discussed in the section 2‚ when small files are stored on HDFS‚ disk utilization is not a bottleneck. In general‚ small file problem occurs when memory of NameNode is highly consumed by the metadata and BlockMap of huge numbers of files. NameNode stores file system metadata in main memory and the metadata of one file takes about 250 bytes of memory. For each block by default three replicas are created and its metadata takes about 368
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basic process of taking data and converting it into information). * They then take each record and store it into different files. * Retail company receives receiving report. * They then input the data from the report into the computer. * That data is then converted into information in the form of records. * The records are then stored into different files (one of which adds to inventory on-hand balances). * Retail company receives shipping report from the sales department.
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