I [Start, Ti] 2 [Start, T2] 3 [T1, Bounce, 500, 1000] 4 [T2, Salary, 4000,4400] 5 [Checkpoint, Active={T1, T2}] 6 [T2, Bounce, 1000, 1500] 7 [Commit, T₂] 8 [Start, T3] 9 [T1, Salary, 4400, 7000] 10[Checkpoint, Active={T1, T3}] 11[T3, Tax,300,500] 12[T3,EmpN,10,14] 13 [Commit, T₁] 14[Commit, T3] 15[Start, T8] 16[T8,Bounce,1500,1550] 17[Start, T5] 16[Checkpoint, Active={T5, T8}] 17 [Start, T7] 18 [T7, abc,6,8] 19 [T5, MangN, 1,2] 20 [Commit, T5] 21 [Start, T9] 22 [T9, MangN,2,3] 23 [Commit, T9] 24 [System Failure] 2. Using Immediate Updates recovery scheme answer the following questions. Which transactions will be undone, redone and What will be the values of Salary and Tax after recovering the system? Redone: Undone: Salary Tax MangN

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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  1. Using Immediate Updates recovery scheme answer the following questions.

Which transactions will be undone, redone and What will be the values of Salary and Tax after recovering the system?

I [Start, Ti]
2 [Start, T2]
3 [T1, Bounce, 500, 1000]
4 [T2, Salary, 4000,4400]
5 [Checkpoint, Active={T1, T2}]
6 [T2, Bounce, 1000, 1500]
7 [Commit, T₂]
8 [Start, T3]
9 [T1, Salary, 4400, 7000]
10[Checkpoint, Active={T1, T3}]
11[T3, Tax,300,500]
12[T3,EmpN,10,14]
13 [Commit, T₁]
14[Commit, T3]
15[Start, T8]
16[T8,Bounce,1500,1550]
17[Start, T5]
16[Checkpoint, Active={T5, T8}]
17 [Start, T7]
18 [T7, abc,6,8]
19 [T5, MangN, 1,2]
20 [Commit, T5]
21 [Start, T9]
22 [T9, MangN,2,3]
23 [Commit, T9]
24 [System Failure]
2.
Using Immediate Updates recovery scheme
answer the following questions.
Which transactions will be undone, redone and
What will be the values of Salary and Tax after
recovering
the
system?
Redone:
Undone:
Salary
Tax
MangN
Transcribed Image Text:I [Start, Ti] 2 [Start, T2] 3 [T1, Bounce, 500, 1000] 4 [T2, Salary, 4000,4400] 5 [Checkpoint, Active={T1, T2}] 6 [T2, Bounce, 1000, 1500] 7 [Commit, T₂] 8 [Start, T3] 9 [T1, Salary, 4400, 7000] 10[Checkpoint, Active={T1, T3}] 11[T3, Tax,300,500] 12[T3,EmpN,10,14] 13 [Commit, T₁] 14[Commit, T3] 15[Start, T8] 16[T8,Bounce,1500,1550] 17[Start, T5] 16[Checkpoint, Active={T5, T8}] 17 [Start, T7] 18 [T7, abc,6,8] 19 [T5, MangN, 1,2] 20 [Commit, T5] 21 [Start, T9] 22 [T9, MangN,2,3] 23 [Commit, T9] 24 [System Failure] 2. Using Immediate Updates recovery scheme answer the following questions. Which transactions will be undone, redone and What will be the values of Salary and Tax after recovering the system? Redone: Undone: Salary Tax MangN
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