Explain two-phase locking protocol, Operating System

Assignment Help:

Q. Show that a few schedules are possible under the two-phase locking protocol however not possible under the timestamp protocol and vice versa.

Answer: A schedule that is authorized in the two-phase locking protocol but not in the timestamp protocol is:

1660_Explain Two-phase locking protocol.png

This schedule isn't allowed in the timestamp protocol because at step 7 the W-timestamp of B is 1.

A schedule that is permitted in the timestamp protocol but not in the two-phase locking protocol is:

2316_Explain Two-phase locking protocol1.png

This schedule can't have lock instructions added to formulate it legal under two-phase locking protocol because T1 must unlock (A) between steps 2 and 3 and must lock (B) between steps 4 and 5.


Related Discussions:- Explain two-phase locking protocol

What are the different directory structures, What are the different directo...

What are the different directory structures? Explain each type. There are five dissimilar directory structures: 1.      Single level directory 2.      Two level directory

Producer - consumer synchronization, This assignment is based on Programmin...

This assignment is based on Programming Project 6.40 in Silbershatz. Implement the ProducerXConsumer program according to the instructions for Project 6.40 for both Linux and Win32

Explain what is file structure, Problem 1. List out the conditions that...

Problem 1. List out the conditions that result in Deadlock situations. Illustrate deadlock situation with a simple graphical notation Listing conditions for deadlock occu

Explai basic concepts of demand paging, Basic concepts When a process i...

Basic concepts When a process is to be changed in, the pager guesses which pages will be used before the process is changed out again. Instead of swapping in a entire process,

Networking sockets with the use of shared memory, Q. Compare the utilizatio...

Q. Compare the utilization of networking sockets with the use of shared memory as a mechanism for communicating data between processes on a single computer. What are the merits of

Bind a real-time thread to an lwp, Q. Suppose an operating system maps user...

Q. Suppose an operating system maps user-level threads to the kernel utilizing the many-to-many model where the mapping is done through the use of LWPs. In addition the system allo

Explain wait for graph, Explain Wait for Graph a. Use a resource alloca...

Explain Wait for Graph a. Use a resource allocation graph to derive a wait-for graph.  b. Wait-for graph acquired by making an edge from p 1 to p 2 iff p 1 is waiting for

What is the use of the command interpreter, Q. What is the use of the comma...

Q. What is the use of the command interpreter? Why is it generally separate from the kernel? Answer: It reads commands from the user or else from a file of commands and execu

Catalogue the design goals of windows xp, Q. Catalogue the design goals of ...

Q. Catalogue the design goals of Windows XP. Answer: Design goals comprise security and reliability and Windows and POSIX application compatibility with high performance and ex

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd