File Systems File Systems DSCI 551 Wensheng Wu 1 Roadmap • Files and directories – CRUD operations via system calls • Implementing CRUD – Data structures, e.g., organization of blocks – Access methods: turn system calls into operations on data structures 2 Files and directories • File content stored in blocks on storage device – […]
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Course Review Introduction DSCI 551 Wensheng Wu 1 Logistics • Instructor email: • Class meeting times (2 sections): – MW 3:30-5:20pm – Tuesday 3:30-6:50pm • Office hours: – MW 2:30-3:15pm (Zoom, link to be posted) – After class – Please email for appointment 2 mailto: Logistics • TAs & office hours – Watch the announcements
Hadoop & MapReduce Hadoop & HDFS DSCI 551 Wensheng Wu 1 Hadoop • A large-scale distributed & parallel batch- processing infrastructure • Large-scale: – Handle a large amount of data and computation • Distributed: – Distribute data & computation over multiple machines • Batch processing – Process a series of jobs without human intervention 2
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CS246-F20-01-UnixShell Lecture 1.3 • Commands in bash – type/which – echo – “Globbing” aka command-line pattern expansions CS246 • Generally, if you execute a shell interactively, you are running command-line programs with options and arguments (args are often filenames) • A command can be one of (in order or searching): a) an alias (i.e., a
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GETTING STARTED GUIDE CS 246, FALL 2021 Getting Started Guide 1 CS undergraduate environment Whenever you are asked for a “host name”, please use linux.student.cs.uwaterloo.ca instead of the name of a specific machine. CSCF periodically upgrades their servers, which changes the names. It also means that you’ll get assigned to a machine so that the
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CS246-F20-01-UnixShell Lecture 1.13 • Writing bash scripts – Basics, command-line parameters, routines CS246 Scripting UNIX with bash • We’ve introduced you to basic concepts and commands of the UNIX shell bash – We’re going to build up your knowledge of how the shell works so that you can create executable programs out of these building
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CS246-F20-01-UnixShell Lecture 1.2 • The UNIX file system • Introducing the bash shell CS246 The UNIX file system Image from http://www.openbookproject.net/tutorials/getdown/unix/lesson2.html The UNIX file system • Pretty much all OSs have a file system of some kind – Even iOS does, tho it’s hidden from users – In OSs for small devices, it’s often a
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1 University of Waterloo Cheriton School of Computer Science CS 251: Sections 1, 2, and 3 Computer Organization and Design Slides for Fall 2021 These slides are for the use of students taking CS 251 in Fall 2021. You should not share these files with anyone else, and you agree to delete all your copies
Microsoft Word – winter20-cs111-final-answer.docx Final Examination CS 111, Winter 2020 3/18/2020, 11:30AM – 2:30PM Name: Student ID: One single-sided cheat sheet is allowed. I understand this is a closed book, closed notes test and I herby attest that I have completed this exam solely by myself. Signature: 1. Paging. Consider a memory architecture using two-level
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My sites / 21S-COMSCI111-1 / Site info / Final Exam Spring 2021 – Finals week Spring 2021 – COM SCI111-1 – EYOLFSON Question 18 Not yet answered Points out of 6.00 File Systems (20 minutes). In Lab 4, using a block size of 1024, you created a symbolic link (or soft link) to the name