Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Chapter 23, Problem 12PE
Program Plan Intro
Serializability:
- Serializability of the transaction specifies a list of transactions in a schedule (like read, write or commit) that is performed in a manner that it looks like transactions execute in a specific serial order.
- In a given schedule, the individual transaction executes consecutively in isolation (no interference by other transactions).
- The types of serializability in the
database are conflict serializability and view serializability.
Explanation of Solution
b.
Ensuring global serializability:
- The system is guaranteed to have the local serializability, any cycle occurring in the system-wide precedence graph should include two or more different sites and two unique global transactions.
- The ticket scheme guarantees that whenever two global transactions will access data-items at a site, the conflict occurs on that data item (or ticket) at that site...
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