Red Hat CLUSTER SUITE - CONFIGURING AND MANAGING A CLUSTER 2006 Guide d'installation télécharger pdf (Page 11)

Chapter 1.

Red Hat Cluster Suite Overview

Clustered systems provide reliability, scalability, and availability to critical production ser-

vices. Using Red Hat Cluster Suite, you can create a cluster to suit your needs for perfor-

mance, high availability, load balancing, scalability, ﬁle sharing, and economy. This chap-

ter provides an overview of Red Hat Cluster Suite components and functions, and consists

of the following sections:

• Section 1.1 Cluster Basics

• Section 1.2 Red Hat Cluster Suite Introduction

• Section 1.3 Cluster Infrastructure

• Section 1.4 High-availability Service Management

• Section 1.5 Red Hat GFS

• Section 1.6 Cluster Logical Volume Manager

• Section 1.7 Global Network Block Device

• Section 1.8 Linux Virtual Server

• Section 1.9 Cluster Administration GUI

• Section 1.10 Linux Virtual Server Administration GUI

1.1. Cluster Basics

A cluster is two or more computers (called nodes or members) that work together to per-

form a task. There are four major types of clusters:

• Storage

• High availability

• Load balancing

• High performance

Storage clusters provide a consistent ﬁle system image across servers in a cluster, allowing

the servers to simultaneously read and write to a single shared ﬁle system. A storage cluster

simpliﬁes storage administration by limiting the installation and patching of applications

to one ﬁle system. Also, with a cluster-wide ﬁle system, a storage cluster eliminates the

need for redundant copies of application data and simpliﬁes backup and disaster recovery.

Red Hat Cluster Suite provides storage clustering through Red Hat GFS.

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Red Hat CLUSTER SUITE - CONFIGURING AND MANAGING A CLUSTER 2006 Guide d'installation Page 11