Preface

This guide introduces the concept of Extended Distance Clusters (XDC). It describes how to configure and manage HP Serviceguard Extended Distance Clusters for Linux and the associated Software RAID functionality.

In addition, this guide includes information on a variety of Hewlett-Packard (HP) high availability cluster technologies that provide disaster tolerance for your mission-critical applications. Serviceguard has supported disaster tolerant clusters on HP-UX for several years now while it is relatively new on Linux. Features of those disaster tolerant HP-UX systems may be used as an example through this document.

Intended Audience

It is assumed that you are familiar with the following topics

•HP Serviceguard configurations

•Basic RAID concepts

Document Organization

The chapters of this guide include:

•Chapter 1, “Disaster Tolerance and Recovery in a Serviceguard Cluster,” on page 13.

•Chapter 2, “Building an Extended Distance Cluster Using Serviceguard and Software RAID,” on page 51

•Chapter 3, “Configuring your Environment for Software RAID,” on page 61

•Chapter 4, “Disaster Scenarios and Their Handling,” on page 85

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