High Availability and Disaster Recovery - Concepts, Design, Implementation

Preface

Contents

1 Introduction

1.1 Audience

1.2 Roadmap of This Book

1.3 Real-World Examples

2 Elementary Concepts

2.1 Business Issues

2.2 System and Outage Categorization

2.3 High Availability – Handling Minor Outages

2.4 Disaster Recovery – Handling Major Outages

2.5 Quantifying Availability: 99.9. . .% and Reality

2.6 Service Level Agreements

2.7 Basic Approach: Robustness and Redundancy

2.8 Layered Solution with Multiple Precautions

2.9 Summary

3 Architecture

3.1 Objectives

3.2 Conceptual Model

3.3 System Model

4 System Design

4.1 Base Concepts

4.2 Solution Roadmap

4.3 System Solution Patterns

5 Hardware

5.1 Components and Computer Systems

5.2 Disk Storage

5.3 Virtualization of Resources

5.4 Vendor Selection and Purchasing Decisions

5.5 System Installation

5.6 System Maintenance and Operations

5.7 Making Our Own Statistics

6 Operating Systems

6.1 Failover Clusters

6.2 Load-Balancing Clusters

6.3 Cluster and Server Consolidation

7 Databases and Middleware

7.1 Middleware Categories

7.2 Database Servers

7.3 Web Servers

7.4 Application Servers

7.5 Messaging Servers

8 Applications

8.1 Integration in a Cluster on the Operating System Level

8.2 High Availability Through Middleware

8.3 High Availability From Scratch

8.4 Code Quality Is Important

8.5 Testing for High Availability

9 Infrastructure

9.1 Network

9.2 Infrastructure Services

9.3 Backup and Restore

9.4 Monitoring

10 Disaster Recovery

10.1 Concepts

10.2 Approach

10.3 Conceptual Design

10.4 Solutions

10.5 Disaster-Recovery Tests

10.6 Holistic View – What Is Needed Besides Technology?

10.7 A Prototypical Disaster-Recovery Project

10.8 Failover to Disaster-Recovery Site or Disaster- Recovery Systems

A Reliability Calculations and Statistics

A.1 Mathematical Basics

A.2 Mean Time Between Failures and Annual Failure Rate

A.3 Redundancy and Probability of Failures

A.4 Raid Configurations

A.5 Example Calculations

A.6 Reliability over Time – the Bathtub Curve

B Data Centers

B.1 Room Installation

B.2 Heat and Fire Control

B.3 Power Control

B.4 Computer Setup

C Service Support Processes

C.1 Incident Management

C.2 Problem Management

C.3 Configuration Management

C.4 Change Management

C.5 Release Management

C.6 Information Gathering and Reporting

References

Index