Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Computer Engineering Expert

problem 1

The performance of a file system depends on the cache hit rate (fraction of blocks found in the cache). If it takes 1 msec to satisfy a request from cache, however 40 msec to satisfy a request if a disk read is needed, provide a formula for mean time required to satisfy a request if the hit rate is h. Plot this function for values of h changing from 0 to 1.0.

problem 2

A UNIX file system has 1-KB blocks and 4-byte disk addresses. What is maximum file size if i-nodes hold 10 direct entries, and one single, triple, and double indirect entry each?

problem 3

How many disk operations are needed to fetch i-node for the file /usr/ast/courses/os/handout.t? Suppose that i-node for the root directory is in memory, but nothing else along the path is in memory. Also suppose that all directories fit in one disk block.

problem 4

Illustrate when you run unlink () operation to remove a file on ext3 file system. Be specific about what disk blocks have to be written where in what order. Describe your assumptions.

problem 5

The ext3 fsck program recovers a crashed ext3 file system through scanning the journal of this file system and replaying each record in journal. The ext3 fsck program also clears the journal to save space for new journal records. Is there a strict order between the two steps? Why or why not?

problem 6

In the software v.s. hardware virtualization paper, the author discussed the problem with popfl in Section 4.4. What exactly is the problem?

problem 7

As the number of cores keeps rising, the probability that some cores fail at any given moment also raises. What are the implications of this trend on Barrelfish?

problem 8

prepare pseudo code to execute the pthread_create wrapper of the Tern memoizer. Note you need to describe your data structure for maintaining deterministic thread IDs. In addition, think of what might go wrong when the child thread calls self().

Computer Engineering, Engineering

  • Category:- Computer Engineering
  • Reference No.:- M91503

Have any Question? 


Related Questions in Computer Engineering

1 in an internet we change the lan technology to a new one

1. In an internet, we change the LAN technology to a new one. Which layers in the TCP/IP protocol suite need to be changed? 2. Assume that an application-layer protocol is written to use the services of UDP. Can the appl ...

1 determine the worst case time complexity for each method

1. Determine the worst case time complexity for each method of the Map ADT implemented in Section 3.2. 2. Modify the binary search algorithm to find the position of the first occurrence of a value that can occur multiple ...

1 what is the difference between a threat agent and a

1. What is the difference between a threat agent and a threat? 2. What is the difference between vulnerability and exposure? 3. How is infrastructure protection (assuring the security of utility services) related to info ...

1 write down the bit pattern in the fraction assuming a

1. Write down the bit pattern in the fraction assuming a floating point format that uses Binary Coded Decimal (base 10) numbers in the fraction instead of base 2. Assume there are 24 bits, and you do not need to normaliz ...

Rewrite exercise 2 using the sortedlist classexercise

Rewrite Exercise 2 using the SortedList class. Exercise 2 Write a program that stores names and phone numbers from a text file in a dictionary, with the name being the key. Write a method that does a reverse lookup, that ...

Add a time deposit account class to the bank account

Add a Time Deposit Account class to the bank account hierarchy. The time deposit account is just like a savings account, but you promise to leave the money in the account for a particular number of months, and there is a ...

As a continuation of our course project due in unit viii a

As a continuation of our course project due in Unit VIII, A Permit By Rule (PBR) Application for an Interior Surface Coating Facility, complete the next section, "Operational Air Emission Rates," of your proposal by foll ...

1 what are the most important criteria for selecting an

1. What are the most important criteria for selecting an internetworking device? 2. What is the difference between single-mode and multimode fiber? Which is faster? 3. Why are QoS features often necessary in LAN switches ...

We now analyze the security of des double encryption 2des

We now analyze the security of DES double encryption (2DES) by doing a cost-estimate: 1. First, let us assume a pure key search without any memory usage. For this purpose, the whole key space spanned by K 1 and K 2 has t ...

Given an example of broadcast usage in the network and data

Given an example of broadcast usage in the network and data link layers. For each case, (1) name the protocol that utilizing the broadcast, (2) the reason why the broadcast rather that unicast is used, and (3) how the fa ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro