File Management Tanenbaum, Chapter 4 COMP3231 Operating Systems Kevin Elphinstone 1 Outline • Files and directories from the programmer (and user) perspective • Files and directories internals – the operating system perspective 2 A brief history of file systems Early batch processing systems –No OS –I/O from/to punch cards –Tapes and drums for external storage, […]
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File system internals Tanenbaum, Chapter 4 COMP3231 Operating Systems 1 UNIX storage stack Syscall interface: creat open read write … Application FD table OF table VFS FS Buffer cache Disk scheduler Device driver Operating System 2 UNIX storage stack Application Hard disk platters: tracks sectors FD table OF table VFS FS Buffer cache Disk scheduler
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Case study: ext3 FS A brief intro to Journaling The ext3 file system • Design goals – Add journaling capability to the ext2 FS – Backward and forward compatibility with ext2 • Existing ext2 partitions can be mounted as ext3 – Leverage the proven ext2 performance – Reuse most of the ext2 code base –
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Contents CS 3214 Spring 2020 Final Exam May 11, 2020 1 Input and Output (16 pts) 2 2 Running Threads (12 pts) 3 3 Dynamic Memory Management (18 pts) 3 3.1 Sequence1(8pts) ………………………………. 3 3.2 Sequence2(10pts)………………………………. 4 4 Automatic Memory Management (18 pts) 4 4.1 ObjectReachabilityGraph,Take1,(12pts)………………….. 4 4.2 ObjectReachabilityGraph,Take2,(6pts) ………………….. 5 5 Virtual Memory (18
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In Praise of Computer Organization and Design: The Hardware/ Software Interface, Fifth Edition “Textbook selection is often a frustrating act of compromise—pedagogy, content coverage, quality of exposition, level of rigor, cost. Computer Organization and Design is the rare book that hits all the right notes across the board, without compromise. It is not only the
COMPUTER NETWORKING SIXTH EDITION A Top-Down Approach James F. Kurose University of Massachusetts, Amherst Keith W. Ross Polytechnic Institute of NYU Boston Columbus Indianapolis New York San Francisco Upper Saddle River Amsterdam CapeTown Dubai London Madrid Milan Munich Paris Montréal Toronto Delhi Mexico City São Paulo Sydney Hong Kong Seoul Singapore Taipei Tokyo Vice President
Assignment #4 – LionCloud (v 1.2) Submit Assignment Due May 1 by 11:59pm Points 125 Submitting a file upload File Types tgz and tar.gz Available Apr 1 at 12am – May 1 at 11:59pm about 1 month In this assignment you will extend the device driver you have been building in the previous assignments. Everything
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COMP5349 – Cloud Computing Week 6: Distributed Execution: HDFS and YARN Dr. Ying Zhou School of Computer Science Outline n Distributed Execution Basics n GFS and HDFS n MapReduce on YARN 06-2 Last Two Weeks n In Last two weeks we cover basic APIs of MapReduce and Spark framework We run them on single node
School of Computer Science Dr. Ying Zhou COMP5349: Cloud Computing Sem. 1/2020 Objectives Week 4: MapReduce Tutorial Hadoop has grown into a large ecosystem since its launch in 2006. The core of Hadoop includes a distributed file system HDFS and a parallel programming engine MapReduce. Since Hadoop 2, YARN is included as the default resource
COMP5349: Cloud Computing Week 1: Git Tutorial A brief Intro to Git Git is a version control system that allows people, mainly developers, to manage a project or a set of files by tracking their changes over time. A centralised hosting service is usually required to synchronise the changes made by different users or by
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