CS502 Operating Systems Fall 2006

1
Week 8 Outline

• CS-502 Operating SystemsFall 2006

2
Reminder Term Project Oral Reports

• Presentations begin next week (November 6)
• Kevin Bobrowski
• Keith Reynolds
• Lianne Elsner
• Mike Anastasia
• Ten minutes each, plus 5 minutes for questions
• PowerPoint (or equivalent) slides
• Submit slides via turnin after presentation
• TermProjectPhase2 on web-based turnin system

3
Outline for Today

• Note on submitting patch files
• Questions Discussion on Project 3
• More on Files and Disks
• Networks
• (If time) Distributed File Systems

4
Submitting Patch Files

• Keep patch files short
• Only changes you make
• Differences from original kernel sources
• Do not include
• config files
• Output of make commands
• Files such as files, backup copies, etc.
• Do include your name at top of each patch file

5
Patch files (continued)

• Review each patch file before submitting
• Each section begins with a line starting
• diff -urN followed by names of files
• If this is not one of the files you intend to
  submit, please delete from your source tree and
  redo patch
• You may freely add your name or any comments
  before the first diff -urN line
• Do not use diff3 or three-part patches
• Do create patch from directory immediate above
  your kernel source
• Dont prefix with ./

6
Patch Files (continued)

• Easy way to keep source tree clean
• make O/buildDirectory xconfig
• make O/buildDirectory
• sudo make O/buildDirectory modules_install
  install

7
Also remember

• Need Makefile for test programs
• Kernel include files and user-space include files
  are completely independent!
• Dont try to add your own user-space include
  files to /usr/include/linux
• Instead, use include prinfo.h
• I need to build your kernel and test program
  myself
• without having to figure out how to do it!

8
Review (Last Week)

• Files a major abstraction of every OS
• File attributes metadata
• File allocation methods
• Contiguous
• Linked (and FAT)
• Indexed (i-node)
• Directories
• Special types of files, for finding other files
• Bad Blocks
• Scalability of File Systems

9
Reading Assignments in Silbershatz

• Last weeks material
• Disks (general) 12.1 to 12.6
• File systems (general) Chapter 11
• Ignore 11.9, 11.10 for now!
• This weeks material
• RAID 12.7
• Stable Storage 12.8
• Log-structured File System 11.8 6.9

10
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