Configuring a Cluster for High Availability

Before starting this section, you must have created one or more Application Server clusters. For information on how to create a cluster, see To Create a Cluster.

From the machine on which the Domain Administration Server is running, configure the cluster to use HADB using this command:

asadmin configure-ha-cluster --user admin --hosts hadb_hostname,hadb_hostname --devicesize 256 clusterName

Replace hadb_hostname with the host name of the machine where HADB is running, and clusterName with the name of the cluster. If you are using just one machine, you must provide the host name twice.

This simplified example runs two nodes of HADB on the same machine. In production settings, using more than one machine is recommended.