1082 3110 檔案處理與輸出入系統(File Processing and I/O Systems)

• Environment
  • Hardware: Standard Hard Disk Drive
  • OS: Ubuntu 16+
  • Programming Language: C

Homework 1

I/O Performance under Sequential and Random R/W Workloads

• Write a program that creates a 100MB file on your local disk
• Measure the time of following six I/O access scenarios
  • Sequential Read
  • Sequential Write
  • Sequential Write (using O_DIRECT)
  • Random Read
  • Random Write
  • Random Write (using O_DIRECT)

Homework 2

Regular file I/O with the system calls and library layer APIs

• Measure the time of following six I/O access scenarios
  • 1 Byte Batch POSIX system calls
  • 1 Byte Batch C stdio library calls
  • 4 KB Batch POSIX system calls
  • 4 KB Batch C stdio library calls
  • 8 KB Batch POSIX system calls
  • 8 KB Batch C stdio library calls

Homework 3

Doing File I/O by Standard C Library, File I/O System Calls and Memory-Mapped Files

• Measure the time of following six I/O access scenarios
  • 25*220 sequantial 4B-sized copy-write with C stdio library calls
  • 25*210 sequential 4KB-sized copy-write with C stdio library calls
  • 25*220 sequantial 4B-sized copy-write with POSIX system calls
  • 25*210 sequential 4KB-sized copy-write with POSIX system calls
  • 25*220 sequantial 4B-sized copy-write with memory-mapped file
  • 25*210 sequential 4KB-sized copy-write with memory-mapped file

Homework 4

Searching a file

• Implement a simple version of unix find command

Homework 5

FTP Server

• Implement a simple version of FTP protocal server with pthread & select(), and a corresponding client