Required attributes

These attributes must be present for each DSN in the cluster.oracle.ini file. They have no default values.

The required attributes are listed inTable 7-1, "Required attributes" and described in detail in this section.

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MasterHosts

This attribute lists the names of the hosts that can contain master data stores in the active standby pair. The first host listed has the active data store when the cluster is started initially and after restarts. There are exceptions to the designated order:

• If there are already active and standby data stores on specific nodes when the cluster is stopped, then the active and standby data stores remain on those nodes when the cluster is restarted.

• If the cluster is started and the only existing data store is on a node that is not listed first in MasterHosts, then that node will be configured with the active data store. The first host listed for MasterHosts will be the standby data store.

If the scheme contains no virtual IP addresses, only two master hosts are allowed.

Setting

Set MasterHosts as follows:

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ScriptInstallDir

This attribute denotes the path for the directory that stores action scripts for Oracle Clusterware resources. The scripts are created by the ttCWAdmin utility when it creates a profile for an active standby pair.

Setting

Set ScriptInstallDir as follows: