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Consider the timestamp-ordering protocol, and two transactions, one thatwrites two data items p and q, and another that reads the same two data items.                                                         Give a schedule whereby the timestamp test for a write operation fails andcauses the first transaction to be restarted, in turn causing a cascading abortof the other transaction. Show how this could result in starvation of both transactions.(Such a situation, where two or more processes carry out actions, butare unable to complete their task because of interaction with the other processes,is called a livelock.)

Consider the timestamp-ordering protocol, and two transactions, one thatwrites two data items p and q, and another that reads the same two data items.                                                         Give a schedule whereby the timestamp test for a write operation fails andcauses the first transaction to be restarted, in turn causing a cascading abortof the other transaction. Show how this could result in starvation of both transactions.(Such a situation, where two or more processes carry out actions, butare unable to complete their task because of interaction with the other processes,is called a livelock.)

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Consider the timestamp-ordering protocol, and two transactions, one that
writes two data items p and q, and another that reads the same two data items.                                                         Give a schedule whereby the timestamp test for a write operation fails and
causes the first transaction to be restarted, in turn causing a cascading abort
of the other transaction. Show how this could result in starvation of both transactions.
(Such a situation, where two or more processes carry out actions, but
are unable to complete their task because of interaction with the other processes,
is called a livelock.)
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