Cluster Terms And Components; Nodes; Resources - HP StorageWorks 4000s - NAS Administration Manual

Cluster Administration
Cluster Node A
Figure 115: NAS server cluster diagram

Cluster Terms and Components

This section provides brief definitions of clustering terms. This information provides basic
knowledge of clusters and the terminology used throughout this document.

Nodes

The most basic parts of a cluster are the server heads. A server node is any individual computer
in a cluster or a member of the cluster. If the NAS device is a member of a cluster, then the
server heads are referred to as nodes.

Resources

Hardware and software components that are managed by the cluster service are called cluster
resources. Cluster resources have three defining characteristics:
Examples of cluster resources are IP addresses, network names, physical disk resources, and
file shares.
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Node A
HBA 1
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+
+
+
+
SAN Switch
Cluster
Quorum
Mirrorset
LUN 1
They can be brought online and taken offline.
They can be managed in a cluster.
They can be owned by only one node at a time.
Private Network
Node A
+
+
HBA 2
+
+
+
+
+
+
Node B
HBA 2
SAN Switch
Storage Area Network
Data RAID set
Data RAID set
Node A
LUN 2
NAS 4000s and 9000s Administration Guide
Cluster Node B
Node B
HBA 1
Node B
LUN 3