Answered: As MTTR drops to zero, what happens to…

As MTTR drops to zero, what happens to availability? Does this seem like a situation that might be defined in terms of reality?

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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Concept explainers

Concurrency Control

The simultaneous occurrence of two or more operations is called concurrence and the situation is called concurrency. In concurrency, the function of one operation can affect the function of the other and put data integrity at risk. Hence, management for the control of concurrency is required. The management or controlling system in the Database Management System (DBMS) that coordinates concurrent access is called the concurrency control system.

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A database used by an airline that implements "snapshot isolation" serves as an excellent starting point for this example. What if a non-serializable execution results in a better overall performance for the airline?
When the MTTR drops to zero, what does that mean for availability? Is it possible to accurately describe the situation?
For the sake of this illustration, let's pretend that there is a database for an airline that uses "snapshot isolation." There is a possibility that Airline will agree to a non-serializable execution if it is determined that this course of action would result in improved overall performance.
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