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You are developing a storage system for a application that demands unusually high reliability, so you have decided to use a three-replica durable storage scheme. You plan to use three ordinary disk drives D1, D2, and D3, and arrange that D2 and D3 store identical mirror copies of each block stored on D1. The disk drives are of a simple design that does not report read errors. That is, they just return data, whether or not it is valid.
10.1a. You initially construct the application so that it writes a block of data to the same sector on all three drives concurrently. After a power failure occurs during the middle of a write, you are unable to reconstruct the correct data for that sector. What is the problem?
10.1b. Describe a modification that solves this problem.
10.1c. One day there is a really awful power glitch that crashes all three disks in such a way that each disk corrupts one random track. Fortunately, the system wasn't writing any data at the time. Describe a procedure for reconstructing the data and explain any cases that your procedure cannot handle.
Distinguish between application and system software. Differentiate between system development and program development. Explain security, privacy and ethical issues related to information technology.
Compare the difficulty of writing sub queries and joins with the difficulty of dealing with anomalies caused by multivalued dependencies.
How do you specify a particular color to be used as fill when using the Graphics class?
Ad Hoc Versus Standard Representations and Formal Versus Informal StandardsChange is a constant in the field of health care, and this continual evolution necessitates various means of classifying and representing the vast amount of health informat..
Create the logic for a program that accepts input values for the projected cost of a vacation and the number of months until vacation. Pass both values to a method that displays the amount you must save per month to achieve your goal.
Where did the concept of object oriented programming originate
Problem question from Kendall and Kendall, Systems Analysis and Design 9th Edition. Problem 1 page 395. see the attached table for question details.
How to determine the eigenvalues of L(P) in the following stages : - determine the eigenvalues of Kn
The program should allow the user to enter each student's name and his or her four test scores. It should then calculate and display each student's average test score and a letter grade based on the average.
1. Identify possible actors and use cases involved in Personal Trainer's operations. 2. Create an object relationship diagram for the Personal Trainer information system.
Christian servant leaders profess to serve those whom they lead through love and the moral obligation to promote the greater good of others.
The sequential search algorithm will always find the first occurrence of an item in a data set. Create a new sequential search method that takes a second integer argument indicating which occurrence of an item you want to search for.
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