Pessimistic locking: It is one of the locking methods in concurrency control. The lock exists in the transaction until the transaction gets committed or rolled back. Two-phase locking protocol: It defined the serializability of the transaction but not prevent deadlocks. The process of locking and unlocking can be done using two phases in this protocol. They are: Growing phase and shrinking phase. Growing phase: New lock can be occurred on the transaction without unlocking the data items. The data items are locked in this phase. Shrinking phase: This phase used to release all transaction but not provide new lock on the transaction.

Question

Want to see the full answer?

Answer 1

Question

Chapter 10, Problem 9P

Program Plan Intro

Pessimistic locking:

It is one of the locking methods in concurrency control. The lock exists in the transaction until the transaction gets committed or rolled back.

Two-phase locking protocol:

It defined the serializability of the transaction but not prevent deadlocks. The process of locking and unlocking can be done using two phases in this protocol. They are: Growing phase and shrinking phase.

Growing phase:

New lock can be occurred on the transaction without unlocking the data items. The data items are locked in this phase.

Shrinking phase:

This phase used to release all transaction but not provide new lock on the transaction.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

I have attached my code, under I want you to show me how to enhance it and make it more cooler and better in graphics with following the instructions.

Using R language

Answer 2

Question

Chapter 10, Problem 9P

Program Plan Intro

Pessimistic locking:

It is one of the locking methods in concurrency control. The lock exists in the transaction until the transaction gets committed or rolled back.

Two-phase locking protocol:

It defined the serializability of the transaction but not prevent deadlocks. The process of locking and unlocking can be done using two phases in this protocol. They are: Growing phase and shrinking phase.

Growing phase:

New lock can be occurred on the transaction without unlocking the data items. The data items are locked in this phase.

Shrinking phase:

This phase used to release all transaction but not provide new lock on the transaction.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 3

Question

Chapter 10, Problem 9P

Program Plan Intro

Pessimistic locking:

It is one of the locking methods in concurrency control. The lock exists in the transaction until the transaction gets committed or rolled back.

Two-phase locking protocol:

It defined the serializability of the transaction but not prevent deadlocks. The process of locking and unlocking can be done using two phases in this protocol. They are: Growing phase and shrinking phase.

Growing phase:

New lock can be occurred on the transaction without unlocking the data items. The data items are locked in this phase.

Shrinking phase:

This phase used to release all transaction but not provide new lock on the transaction.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 10, Problem 9P

Program Plan Intro

Pessimistic locking:

It is one of the locking methods in concurrency control. The lock exists in the transaction until the transaction gets committed or rolled back.

Two-phase locking protocol:

It defined the serializability of the transaction but not prevent deadlocks. The process of locking and unlocking can be done using two phases in this protocol. They are: Growing phase and shrinking phase.

Growing phase:

New lock can be occurred on the transaction without unlocking the data items. The data items are locked in this phase.

Shrinking phase:

This phase used to release all transaction but not provide new lock on the transaction.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

Chapter 10, Problem 9P

Program Plan Intro

Pessimistic locking:

It is one of the locking methods in concurrency control. The lock exists in the transaction until the transaction gets committed or rolled back.

Two-phase locking protocol:

It defined the serializability of the transaction but not prevent deadlocks. The process of locking and unlocking can be done using two phases in this protocol. They are: Growing phase and shrinking phase.

Growing phase:

New lock can be occurred on the transaction without unlocking the data items. The data items are locked in this phase.

Shrinking phase:

This phase used to release all transaction but not provide new lock on the transaction.

Answer 6

Chapter 10, Problem 9P

Program Plan Intro

Pessimistic locking:

It is one of the locking methods in concurrency control. The lock exists in the transaction until the transaction gets committed or rolled back.

Two-phase locking protocol:

It defined the serializability of the transaction but not prevent deadlocks. The process of locking and unlocking can be done using two phases in this protocol. They are: Growing phase and shrinking phase.

Growing phase:

New lock can be occurred on the transaction without unlocking the data items. The data items are locked in this phase.

Shrinking phase:

This phase used to release all transaction but not provide new lock on the transaction.

Answer 7

Chapter 10, Problem 9P

Program Plan Intro

Pessimistic locking:

It is one of the locking methods in concurrency control. The lock exists in the transaction until the transaction gets committed or rolled back.

Two-phase locking protocol:

It defined the serializability of the transaction but not prevent deadlocks. The process of locking and unlocking can be done using two phases in this protocol. They are: Growing phase and shrinking phase.

Growing phase:

New lock can be occurred on the transaction without unlocking the data items. The data items are locked in this phase.

Shrinking phase:

This phase used to release all transaction but not provide new lock on the transaction.

Answer 8

Expert Solution & Answer

Answer 9

Expert Solution & Answer

Answer 10

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 11

Ch. 10 - Prob. 1RQ Ch. 10 - Prob. 2RQ Ch. 10 - Prob. 3RQ Ch. 10 - Prob. 4RQ Ch. 10 - Prob. 5RQ Ch. 10 - Prob. 6RQ Ch. 10 - Prob. 7RQ Ch. 10 - Prob. 8RQ Ch. 10 - Prob. 9RQ Ch. 10 - Prob. 10RQ

Solution Summary: The author explains that pessimistic locking is one of the locking methods in concurrency control. Two-phase locking protocol defines serializability of transaction but not prevent deadlocks.

Concept explainers

Want to see the full answer?

Chapter 10 Solutions