Chapter 7
Installing and Configuring
Clusters
This chapter explains how clusters work and how to install and configure them. It has the following sections:
•Section 7.2, “Benefits of Clusters”
•Section 7.3, “Installation and Configuration”
•Section 7.4, “Cluster Installation”
•Section 7.5, “Installing SCSI Drives”
7.1Overview
Physically, a cluster is a grouping of two independent servers that can access the same shared data storage and provide services to a common set of clients. With current technology, this usually means servers connected to common I/O buses and a common network for client access.
Logically, a cluster is a single management unit. Any server can provide any available service to any authorized client. The servers must have access to the same shared data and must share a common security model. Again, with current technology, this generally means that the servers in a cluster will have the same architecture and run the same version of the same operating system.
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