Question: Figure 23.6 shows the log corresponding to a particular schedule at the point of a system crash for the four transactions T1, T2, T3, and

Figure 23.6 shows the log corresponding to a particular schedule at the point of a system crash for the four transactions T1, T2, T3, and T4 of Figure 19.4. Suppose that we use the immediate update protocol with checkpointing. Describe the recovery process from the system crash. Specify which transactions are rolled back, which operations in the log are redone and which (if any) are undone, and whether any cascading rollback takes place.

Step by Step Solution

★★★★★

3.36 Rating (165 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

First we note that this schedule is not recoverable since transaction T4 has read the value of B wri... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

888-CS-DB (2391).docx

120 KBs Word File

Students Have Also Explored These Related Databases Questions!

Figure 1-23 shows that a number of UNIX system calls have no Win32 API equivalents. For each of the calls listed as having no Win32 equivalent, what are the consequences for a programmer of...

The asymptotic log-magnitude curves for two transfer functions are given in Figure P8.6. Sketch the corresponding asymptotic phase shift curves for each system. Determine the transfer function for...

Figure 8.19 shows tie operations that Alice must perform with POP to provide confidentiality, authentication, and integrity. Diagram the corresponding operations that Bob mat perform on the package...

(i) Write down the system log for the following schedule. The symbol ci stands for commit event of the ith transaction. r1(X); r3(X); w1(X); c1; r2(Y); w3(X); c3; w2(Y); c2; (ii) The figure below...

Figure 22.6 shows the log corresponding to a particular schedule at the point of a system crash for four transactions T 1 , T 2 , T 3 , and T 4 . Suppose that we use the immediate update protocol...

Figure 2 2 . 6 shows the log corresponding to a particular schedule at the point of a system crash for four transactions T 1 , T 2 , T 3 , and T 4 . Suppose that we use the immediate update protocol...

(i) Write down the system log for the following schedule. The symbol ci stands for commit event of the ith transaction. r2(X); r1(Z); r3(X); w3(X); c3; w2(X); c2; w1(Z); c1; [4 Marks] (ii) The figure...

i) Write down the system log for the following schedule. The symbol ci stands for commit event of the ith transaction. r1(X); r3(X); w1(X); c1; r2(Y); w3(X); c3; w2(Y); c2; [4 Marks] (ii) The figure...

Figure b shows the log corresponding to a particular schedule at the point of a system crash for the four transactions T 1 , T 2 , T 3 , and T 4 of Figure a . Suppose that we use the immediate update...

Suppose a company recently hired a well-known speaker to give a seminar to its employees about Business Ethics in Data Mining. The senior managers thought the seminar was enlightening but wanted to...

What is quality? How do you define quality at a university? At your workplace? Name an organization you belong to or know of that does a great job with quality? Why do you believe this to be true?...

You have been called upon to address the hospital's board of trustees regarding a potential allocation of a portion ( $ 2 , 0 0 0 , 0 0 0 ) of the hospital's profit into a specific industry. Upon...

Signals are transmitted according to a Poisson process with rate . Each signal is successfully transmitted with probability p and lost with probability 1 p. The fates of different signals are...

What are the different stages of processing a query in a DDBMS?

Discuss the different techniques for executing an equijoin of two files located at different sites. What main factors affect the cost of data transfer?

Discuss the semijoin method for executing an equijoin of two files located at different sites. Under what conditions is an equijoin strategy efficient?

(Solving a comprehenelve problem) Use the end-oryear stock price data in the popup window. , to answer the following questions for the Harris and Pinwheel companies. a. Compuile the annual rates of...

what nominal return was recieved by an investor when inflation averaged 3.46% and the real rate of return was 2.5%? a) 0.96% b)5.96% c) 6.05% d)5.47%

Your firm has a credit rating of A . You notice that the credit spread for five - year maturity A debt is 9 1 basis points ( 0 . 9 1 % ) . Your firm's five - year has semi - annual coupons and a...