Question: Consider the following locking protocol: Before a transaction T writes a data object A, T has to obtain an exclusive lock on A. For a

Consider the following locking protocol: Before a transaction T writes a data object A, T has to obtain an exclusive lock on A. For a transaction T, we hold these exclusive locks until the end of the transaction. If a transaction T reads a data object A, no lock on A is obtained. State which of the following properties are ensured by this locking protocol: serializability, conflict-serializability, recoverability, avoids cascading aborts, avoids deadlock. Justify your answer for each property.

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

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

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Portray in words what transforms you would have to make to your execution to some degree (a) to accomplish this and remark on the benefits and detriments of this thought.You are approached to compose...

Prolog You are approached to compose a Prolog program to work with twofold trees. Your code shouldn't depend on any library predicates and you ought to expect that the mediator is running without...

Database Administration CHAPTER OBJECTIVES I Understand the need for and importance of database I ttno'illI the meaning of ACID transaction administralin - Learn the tour 1992 ANSI standard isolation...

A creative engineer suggests structuring the TLB so that not all the bits of the presented address need match to result in a hit. Suggest how this might be achieved, and what might be the costs and...

For each of the following locking protocols, assuming that every transaction follows that locking protocol, state which of these desirable properties are ensured: (1) recoverability, (2) avoidance of...

Write a program that simulates the behavior of the two-phase locking (2PL) protocol for concurrency control. The particular protocol to be implemented will be rigorous 2PL, with the wait-die method...

lup ] (d) Show how a generating (or "mother") wavelet (x) can spawn a family of "daughter" wavelets jk(x) by simple shifting and scaling operations, and explain the advantages of representing...

Suppose that R(A, B, C) is a relational schema with functional dependencies F = {A, B C, C B}. (i) Is this schema in 3NF? Explain. [2 marks] (ii) Is this schema in BCNF? Explain. [2 marks] (b)...

[ Question 1 ] Consider the following relational schema: Student ( S# , Sname, Dept ) Prof ( P# , Pname, Dept, Salary ) Course ( C# , Cname, Text ) St - Course ( S# , C# ) Prof - Course ( P# , C# )...

Discuss the differences, similarities, and ties between finance and accounting.

Silky Limited, a private company that complies with accounting standards for private enterprises (ASPE), has redeemable preferred shares outstanding that carry a dividend of 5%. If the shares are not...

A retirement plan in which a company pays a specific monthly or yearly retirement benefit amount based upon an employee's "years of service" to a company is called a _ _ _ _ _ _ _ _ _ _ pension plan.

1. A distillation column receives a feed that is 40 mole %n-pentane and 60 mole % n-hexane. Feed flow rate is 2,500lbmol/hr. The column is at 1atm. A distillate that is 97 mole \% n-pentane is...

6. How does the slope of a budget line illustrate opportunity costs and trade-offs? How does a budget line illustrate scarcity and the effect of limited incomes? LO1.4

11. last word Studies indicate that married men on average earn more income than unmarried men of the same age and education level. Why must we be cautious in concluding that marriage is the cause...

7. What are economic resources? What categories do economists use to classify them? Why are resources also called factors of production? Why are they called inputs? LO1.5