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100: T1 update C (steal) 110: T2 update A 115: Begin_checkpoint 120: T2 update A (steal) 130: T1 update C 140: End_checkpoint 150: T1 commit 160: T2 update C (steal) 170: crash, restart 1. Consider the log above produced by WAL under No-force and Steal policy. With (steal), the update is forced to the disk, and without (steal), the update is made to the memory frame only. The initial value of each page (A and C) is 0 and each update increases the page value by 1. Explain what happens at each line from 100 to 160 during normal execution.

100: T1 update C (steal) 110: T2 update A 115: Begin_checkpoint 120: T2 update A (steal) 130: T1 update C 140: End_checkpoint 150: T1 commit 160: T2 update C (steal) 170: crash, restart 1. Consider the log above produced by WAL under No-force and Steal policy. With (steal), the update is forced to the disk, and without (steal), the update is made to the memory frame only. The initial value of each page (A and C) is 0 and each update increases the page value by 1. Explain what happens at each line from 100 to 160 during normal execution.

Computer Networking: A Top-Down Approach (7th Edition)
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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100: T1 update C (steal)

110: T2 update A

115: Begin_checkpoint

120: T2 update A (steal)

130: T1 update C

140: End_checkpoint

150: T1 commit

160: T2 update C (steal)

170: crash, restart

1. Consider the log above produced by WAL under No-force and Steal policy. With (steal), the update is forced to the disk, and without (steal), the update is made to the memory frame only. The initial value of each page (A and C) is 0 and each update increases the page value by 1. Explain what happens at each line from 100 to 160 during normal execution. 

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