Video Systems in an IT Environment, 2nd Edition

CHAPTER 5

Reliability and Scalability Methods

CONTENTS

5.0 Introduction to High-Availability Systems

5.0.1 Reliability Metrics

5.0.2 Detection and Repair of Faults

5.0.3 Failure Mechanisms

5.1 HDD Reliability Metrics

5.1.1 Failure Rate Analysis Domains

5.2 Methods for High-Availability Design

5.2.1 RAID Arrays

5.2.2 RAID Level Defi nitions

5.2.3 RAID Clusters

5.3 Architectural Concepts for HA

5.3.1 Single Point of Failure

5.3.2 No Single Point of Failure

5.3.3 N + 1 Sparing

5.3.4 Networking with High Availability

5.3.5 Mirroring Methods

5.3.6 Replication of Storage

5.3.7 Client Caching Buys Time

5.3.8 Other Topologies for HA

5.3.9 Concealment Methods

5.3.10 A Few Caveats

5.4 Scaling and Upgrading System Components

5.4.1 Upgrading Components ...