High availability requires:
Two homogenous, network systems with similar configurations in terms of resources such as CPU, memory, and so on
The high availability package and the associated hardware
Devices that are accessible to both nodes
A logical volume manager (LVM) to maintain unique device path names across the cluster nodes
Volumes or disk suite objects on the multihost disks
Third-party vendor mirroring for media failure protection
Logical host name or floating IP address that can be bound to the primary or secondary node. In a symmetric configuration, you need two logical host names, each corresponding to a primary companion.
See the documentation for Sun Cluster for more information about requirements, and for installing platform-specific high availability software.
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