Department of Computer Science

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Operating Systems, Fall 2006, Homework 8

This homework will be covered in practise session on Thursday 9.11.2006 (week 45).

The exercises are based on chapters 10 and 11.1-11.5.

1. Problem 10.2 from text book [Stal05] (Teht. 10.2 [Stal01])
   

2. Problem 10.3 from text book [Stal05] (Teht. 10.3 [Stal01])
   

3. Problem 11.3 from text book [Stal05]

4. Disk scheduling. Compare scheduling policies FIFO, SCAN, SPTF and SATF.
   1. When would FIFO be best? Why?
   2. When would SCAN be best? Why?
   3. When would SPTF be best? Why?
   4. When would SATF be best? Why?
   5. Where in disk would it be advantegous to place a file that is used often? Why?
      

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Tiina.Niklander@cs.helsinki.fi