HP B6960-90078 manual What is a Package, Or Group?, What Is a Virtual, Server?, Failover?

		Integrations with Other Applications
		Cluster Integrations with Data Protector
	all cluster nodes. Each cluster node compares this packet and determines
	which cluster node is still operational so that appropriate ownership of
	the package (MC/SG, Veritas Cluster) or group (MSCS) can be
	determined.
What is a Package	A package (MC/SG, Veritas Cluster) or a group (MSCS) is a collection of
or Group?	resources that are needed to run a specific cluster-awareapplication.
	Each cluster-aware application declares its own critical resources. The
	following resources must be defined in each group or package:
	• Shared disk volumes (MSCS)
	• Shared volume groups (MC/SG, Veritas Cluster)
	•	Network IP names
	•	Network IP addresses
	• Cluster-aware application services
What Is a Virtual	Disk volumes and volume groups represent shared physical disks. A
Server?	network IP name and a network IP address are resources that define a
	virtual server of a cluster-aware application. Its IP name and address
	are cached by the cluster software and mapped to the cluster node on
	which the specific package or group is currently running. Since the group
	or package can switch from one node to another, the virtual server can
	reside on different machines in different time frames.
What Is a	Each package or group has its own preferred node on which it normally
Failover?	runs. Such a node is called a primary node. A package or group can be
	moved to another cluster node (one of the secondary nodes). The process
	of transferring a package or group from the primary cluster node to the

secondary is called failover or switchover. The secondary node accepts the package or group in case of failure of the primary node. A failover can occur for many different reasons:

• Software failures on the primary node

• Hardware failures on the primary node

• The administrator intentionally transfers the ownership because of maintenance on the primary node

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