Consider the following schedule of two transactions: R(B) B E 100 – B W(B) R(A) R(A) R(B) A E 10A + B B E 2B + A A € 30 + 7B W(A) W(A) W(B) Figure 3: Schedule of Q5(b). i. Result-serializability is when the result of a schedule is the same as some serial schedule. Given the initial values A = 10 and B = 20, show if this schedule is result-serializable or not. ii. Show how to add locks/unlocks to make the two transactions T1 and T, conflict serializable.

Computer Networking: A Top-Down Approach (7th Edition)
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ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
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Question
(b)
Consider the following schedule of two transactions:
R(B)
в€ 100 - В
W(B)
R(A)
R(A)
R(B)
A € 10A + B
в € 2B + A
A € 30 + 7B
W(A)
W(A)
W(B)
Figure 3: Schedule of Q5(b).
i. Result-serializability is when the result of a schedule is the same as some serial
10 and B = 20, show if this schedule is
schedule. Given the initial values A
result-serializable or not.
ii. Show how to add locks/unlocks to make the two transactions T1 and T2 conflict
serializable.
Transcribed Image Text:(b) Consider the following schedule of two transactions: R(B) в€ 100 - В W(B) R(A) R(A) R(B) A € 10A + B в € 2B + A A € 30 + 7B W(A) W(A) W(B) Figure 3: Schedule of Q5(b). i. Result-serializability is when the result of a schedule is the same as some serial 10 and B = 20, show if this schedule is schedule. Given the initial values A result-serializable or not. ii. Show how to add locks/unlocks to make the two transactions T1 and T2 conflict serializable.
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