Explanation/Reference:
For the Enterprise Manager Ops Center environment, high availability applies only to the Enterprise
Controller and its co-located Proxy Controller. To avoid a single point of failure in the Enterprise Manager
Ops Center software, transfer the /var/opt/sun/xvm directory structure manually from the primary
Enterprise Controller to a secondary Enterprise Controller. The secondary Enterprise Controller duplicates
the primary Enterprise Controller's configuration and takes over much of the primary Enterprise Controller's
identity, including its host name, its IP addresses, its ssh keys, and its role. Only one Enterprise Controller,
either primary or secondary, can be operational at any time.
Reference: Oracle Enterprise Manager Ops Center Site Preparation Guide, High Availability for the
Enterprise Controller