Red Hat CLUSTER SUITE - CONFIGURING AND MANAGING A CLUSTER 2006 Guia de Instalação descarregar pdf (Página 19)

Chapter 1. Red Hat Cluster Suite Overview 9

Specifying a fencing method consists of editing a cluster conﬁguration ﬁle to assign a

fencing-method name, the fencing agent, and the fencing device for each node in the clus-

ter.

Note

Other fencing parameters may be necessary depending on the type of cluster manager

(either CMAN or GULM) selected in a cluster.

The way in which a fencing method is speciﬁed depends on if a node has either dual power

supplies or multiple paths to storage. If a node has dual power supplies, then the fencing

method for the node must specify at least two fencing devices — one fencing device for

each power supply (refer to Figure 1-6). Similarly, if a node has multiple paths to Fibre

Channel storage, then the fencing method for the node must specify one fencing device for

each path to Fibre Channel storage. For example, if a node has two paths to Fibre Channel

storage, the fencing method should specify two fencing devices — one for each path to

Fibre Channel storage (refer to Figure 1-7).

Figure 1-6. Fencing a Node with Dual Power Supplies

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Red Hat CLUSTER SUITE - CONFIGURING AND MANAGING A CLUSTER 2006 Guia de Instalação Página 19