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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
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Section 1.2 Red Hat Cluster Suite Introduction
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Section 1.3 Cluster Infrastructure
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Section 1.4 High-availability Service Management
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Section 1.5 Red Hat GFS
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Section 1.6 Cluster Logical Volume Manager
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Section 1.7 Global Network Block Device
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Section 1.8 Linux Virtual Server
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Section 1.9 Cluster Administration GUI
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Section 1.10 Linux Virtual Server Administration GUI
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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
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High availability
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Load balancing
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High performance
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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.
Chapter 1.
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