HP ProLiant Storage Server User Guide (440584-001, February 2007)

C
luster Node A
Node A
HBA 1
Private Network
Node A
HBA 2
Node B
HBA 2
Cluster Node
B
Node B
HBA 1
SAN Switch
SAN Switch
Storage Area Network
Cluster
Quorum
Mirrorset
LUN 1
Data RAID set
Node A
LUN 2
Data RAID set
Node B
LUN 3
+
+
+
+
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+
+
+
+
+
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Figure 24 Storage server cluster d iagram
Cluster terms and components
Nodes
The most basic parts of a cluster are the servers, referred to as nodes. A server node is any individual
server in a cluster, or a m em b er of the cluster.
Resourc
es
Hardware and software components that are managed by the cluster service are called cluster resources.
Cluster resources have three defining characteristics:
• They can be brought online and taken offline.
• They ca
n be managed in a cluster.
• Theycanbeownedbyonlyonenodeatatime.
Examples of cluster resources are IP addresses, network names, physical disk resources, and file shares.
Resour
ces represent individual system components. These resources are organized into groups and
managed as a g roup. Som e resources are created automatically by the system and other resources
must be set up manually. Resource types include:
• IP add
ress resource
• Cluster name resource
• Cluster quorum disk resource
• Phys
ical disk resource
• Virtual server name resources
• CIFS file share resources
• NFS fi
le share resources
• FTP file share resources
98
Cluster administration