Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 5.2 Guida di Installazione Scaricare il pdf (Pagina 40)

The following resource types will be defined to provide the high availability functionality for

SAP.

7.2 Configuration

The resource group manager is configured within the cluster configuration file

/etc/cluster/cluster.conf. The configuration is encapsulated within the <rm> tag. The resource

manager configuration has the following basic layout:

<rm>

...

</failoverdomains>

...

</resources>

...

[...]

<events

</rm>

The following <rm> attributes can be defined:

Attribute Description

log_level The log level is number from 0..7, where 7 is

'debug' and 0 is 'emergency only'. The default value

is 4.

log_facility Log facility name, such as daemon, local4, or

similar. The default value is daemon.

central_processing The central_processing option is used to activate

the event mechanism. Central_processing is

needed to enable the hard and soft service

dependencies and the follow_service dependency.

7.3 Failover Domains

The cluster can be divided into logical subsets of cluster nodes. A failover domain is an

ordered subset of members to which a service can be bound.

Failover domains are configured in the cluster configuration file. The following outlines the

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Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 5.2 Guida di Installazione Pagina 40