Question: Draw a precedence graph for each of the schedules (a) (e) in the previous exercise. (a) Read(T1, balx), read(T2, balx), write(T1, balx), write(T2, balx),

Draw a precedence graph for each of the schedules (a) – (e) in the previous exercise.
(a) Read(T1, balx), read(T2, balx), write(T1, balx), write(T2, balx), commit(T1), commit(T2)
(b) Read(T1, balx), read(T2, baly), write(T3, balx), read(T2, balx), read(T1, baly), commit(T1), commit(T2)
(c) Read(T1, balx), write(T2, balx), write(T1, balx), abort(T2), commit(T1)
(d) Write(T1, balx), read(T2, balx), write(T1, balx), commit(T2), abort(T1)
(e) read(T1, balx), write(T2, balx), write(T1, balx), read(T3, balx), commit(T1), commit(T2), commit(T3)

Step by Step Solution

★★★★★

3.49 Rating (172 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a Cycle so not serializable b No cycle so serializable c Without ... 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)

672-CS-DB (1423).docx

120 KBs Word File

Students Have Also Explored These Related Databases Questions!

Consider the precedence graph of Figure is the corresponding schedule conflict serializable? Explain your answer. T2 T1 T4 T5

For each of the following pairs of related entities, indicate whether (under typical circumstances) there is a one-to-many or a many-to-many relationship. Then, using the shorthand notation...

(a) Discuss how you would test for view serializability using a labeled precedence graph. (b) Using the above method, determine whether the following schedules are view serializable:

Append logs in recovery. Justify the answer. Start T1 Read T1, A Read T1, D Write T1, D, 20, 25 Commit T1 Checkpoint Start T2 Read T2, B Write T2, B, 12, 18 Start, T4 Read T4, D Write T4, D, 25, 15...

This section should provide an overview of the main organized exchanges, both inside and outside the United States, from which the company you selected could choose. Note that you do not need to list...

Examine the Schedule below. There are three transactions T1, T2, and T3 T1 T2 T3 start start read Y 4 write X start read X write X commit read X write Y write X commit 9 10 12 13 read Y 14 write Y 15...

command do gc od executes repeatedly as the guarded command gc, while gc continues not to fail, and terminates when gc fails. (a) Assume that boolean and arithmetic expressions have no side effects...

Instruction: Complete ALL questions. Question 1 At Middlesex Family Medical Centre, families are our business. This Centre is the only medical specialty that provides comprehensive medical care in...

3. Consider two transactions (T1 and T2) that occur concurrently. T1 calculates PROD_QOH (product quantity on hand). T2 is correcting some typo error. Time Transaction Step Total Stored Value 100 1...

COMPLETE ALL THE QUESTIONS 1) Make a version of X.32[7] where the element type is a template argument. [10] ( 2.5) Given an Itor class like the one in X.32[8], consider how to provide iterators for...

James Schuster was a sole proprietor doing business as (d. b. a.) Diversity Heating and Plumbing (Diversity Heating). Diversity Heating was in the business of selling, installing, and servicing...

Are any of the gurus quality contributions used where you work or have worked? Explain how.

Engineering Economics: If a project has an initial investment of $ 1 0 0 , 0 0 0 and returns a uniform series of cash flows of $ 2 0 , 0 0 0 per year for 7 years, what is the internal rate of return...

Outline the advertising strategy Johnson Controls might follow to promote the convenience store controller. What benefi ts would you emphasize in the body of an ad?

ABC Markets sell products to customers. The relational diagram shown in Figure represents the main entities for ABCs database. The following important characteristics: A customer may make many...

Create a simple transaction log (using the format shown in Table) to represent the actions of the two previous transactions.

Assuming that pessimistic locking is being used, but the two-phase locking protocol is not, create a chronological list of the locking, unlocking, and data manipulation activities that would occur...

A research center claims that 31% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 700 adults in that country, 35% say that...

You sampled 50 students at Rutgers University-Camden and calculated the mean number of hours spent studying during finals week to be 12. You also calculated a 95% confidence interval for the mean...

Target and Best Buy arc two companies that participate in the merchandising industries and are direct competitors. The financial structure and performance of the two companies differ. The links to...