'File table' diaporamas de présentation

File handling Basics

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File Systems

File Systems. (Some Theory). Topics. Files Directories File system implementation Example file systems. Long-term Information Storage. We have a need to store large amounts of data. Stored information must outlive the process creating it.

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System-Level I/O

System-Level I/O. Outline. Unix I/O Reading File Metadata Sharing Files & I/O redirection Robust I/O Standard I/O Suggested Reading 10.1~10.3, 10.5~10.7, 10.4, 10.8. Why Unix I/O. Input/Output A process of copying data between main memory and external devices Standard I/O library

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CHAPTER 12: FILE SYSTEM IMPLEMENTATION

CHAPTER 12: FILE SYSTEM IMPLEMENTATION. File System Structure File System Implementation Directory Implementation Allocation Methods Free-Space Management Efficiency and Performance Recovery Log-Structured File Systems NFS. FILE-SYSTEM STRUCTURE.

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Data Warehousing

Data Warehousing. -Kalyani. Topics. Definition Types Components Architecture Database Design OLAP Metadata repository. OLTP vs. Warehousing. Organized by transactions vs. Organized by particular subject More number of users vs. less Accesses few records vs. entire table

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TDC368 UNIX and Network Programming

TDC368 UNIX and Network Programming. Week 2: UNIX process concepts. Camelia Zlatea, PhD Email: czlatea@cs.depaul.edu. UNIX process concepts. Process control primitives fork, exec, exit, wait, waitpid getpid, getppid library functions: system. Course Outline. UNIX basic commands.

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What can I do?

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Class 15 Honors

Class 15 Honors. Objectives. Understand some common file I/O functions Set up a program for writing to a file Read information from a file. 3 Steps to Use a File. The file must be opened. If the file does not exist, opening it means creating it.

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Introduction to Unix Operating System

Introduction to Unix Operating System. Introduction: Unix System. Operating System: a system that manages the resources of a computer. Resources: CPUs, Memory, I/O devices, Network Kernel: the memory resident portion of Unix system File system Process Control System.

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Recitation 11 (Nov. 22)

Outline Lab 6: interposition test Error handling I/O practice problem Reminders Lab 6: Due Tuesday. Minglong Shao shaoml+213@cs.cmu.edu Office hours: Thursdays 5-6PM Wean Hall 1315. Recitation 11 (Nov. 22). Exam2 statistics. 118 exams Highest score 74/74 (2 students)

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Operating Systems CMPSCI 377 Lecture 15: File Systems I

Operating Systems CMPSCI 377 Lecture 15: File Systems I. Emery Berger University of Massachusetts, Amherst. Course Outline. Processes & Threads CPU Scheduling Synchronization & Deadlock Memory Management File Systems & I/O Distributed Systems. Files: OS Abstraction.

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Recitation 11: I/O Problems

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Operating system services

Operating system services. Program execution I/O operations File-system manipulation Communications Error detection Resource allocation Accounting Protection. System Calls.

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File Systems Implementation

File Systems Implementation. Recap. What we have covered: User-level view of FS Storing files: contiguous, linked list, memory table, FAT, I-nodes Directories: all attributes in table, variable name length, search Sharing files: hard and soft links

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VxWorks Fall 2005 Final Project CS 450: Operating Systems Section 1

VxWorks Fall 2005 Final Project CS 450: Operating Systems Section 1. Kenneth White Josh Houck Karl Ridgeway Mike Ripley Morgan Serene. Overview. Environment Used Real-Time Operating System (RTOS) Examples of Environments: Home use Modems Traffic Control Systems NASA Pathfinder.

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Disk Layout 10/04/14

Disk Layout 10/04/14. Sourav Sarkar 11CS30037. Boot Control Block . Disk. RAM. Contains info needed by the system to boot OS Contains disk address of the block where the OS is stored. Partition Control Block.

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Advanced UNIX progamming

Advanced UNIX progamming. Fall 2002 Instructor: Ashok Srinivasan Lecture 8. Acknowledgements: The syllabus and power point presentations are modified versions of those by T. Baker and X. Yuan. Announcements. Reading assignment APUE Chapter 7 Section 7.3 is important

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Sytem Call on File System

Sytem Call on File System. Open Close Read/Write. File System ? ?????. ??? ??? ???? ????? open, read, write, close ??? ??? ???? ????? create, mknod Inode ? ????? ?? ??? ?? ??? ????? chdir, chroot, chown, chmod, stat, fstat ?? pipe, dup mount, umount link, unlink.

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Introduction

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