Reliability and Maintenance Modeling with Optimization

3Backup Policies with Random Data Updates

Xufeng Zhao

Nanjing University of Aeronautics and Astronautics, China

Jiajia Cai

Nanjing University of Aeronautics and Astronautics, China

Cunhua Qian

Nanjing Tech University, China

Syouji Nakamura

Kinjo Gakuin University, Japan

CONTENTS

• 3.1 Introduction

• 3.2 Expected Cost Rates

• 3.3 Optimum Backup Times

  • 3.3.1 Incremental Backup

    • 3.3.1.1 Case I

    • 3.3.1.2 Case II

  • 3.3.2 Differential Backup

    • 3.3.2.1 Case I

    • 3.3.2.2 Case II

  • 3.3.3 Numerical Example

• 3.4 Overtime Backup Models

• 3.5 Optimum Backup Times

  • 13.5.1 Incremental Backup

    • 3.5.1.1 Case I

    • 3.5.1.2 Case II

  • 3.5.2 Differential Backup

    • 3.5.2.1 Case I

    • 3.5.2.2 Case II

• 3.6 Comparisons of Update N and Overtime T

  • 3.6.1 Incremental Backup

  • 3.6.2 Differential ...