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

Explain process description in the unix system, Process Description A pr...

Process Description A process in UNIX is a somewhat complex set of data structures that provides the operating system with all of the information necessary to dispatch and manag

Explain system-wide open-file and per-process open-file, Explain system-wid...

Explain system-wide open-file and per-process open-file The system-wide open-file table have a copy of the FCB of each open file, as well as other information. The per-pr

What is an acyclic graph, What is an acyclic graph? A tree that has bee...

What is an acyclic graph? A tree that has been corrupted by links to other branches, but does not have any cyclic paths in it.

Linux os, Introduction of linux

Introduction of linux

Mechanism by which one segment belong to two address spaces, Q. Explain a m...

Q. Explain a mechanism by which one segment could belong to the address space of two different processes. Answer: Because segment tables are a collection of base-limit register

Explain fixed partitioning techniques, FIXED PARTITIONING In a fixed p...

FIXED PARTITIONING In a fixed partitioning, the operating system inhabiting some fixed portion of main memory is available for use of multiple processes -Using fixed partit

Windows admin need it, Windows admin need it Project Description: We ...

Windows admin need it Project Description: We want to protect an executable on operating system level , so the process could be visible among all users while the executable r

Time-Sharing Operating System, Advantages and disadvantages of time-sharing...

Advantages and disadvantages of time-sharing operating system

Write a short note on peer-to-peer computing, Write a short note on peer-to...

Write a short note on peer-to-peer computing. Peer-to-peer (P2P) system model is a kind of distributed OS. In this model, clients and servers aren't distinguished from one anot

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