HP DL160 HP ProLiant Storage Server User Guide (440584-004, February 2008) - Page 126

Cluster terms and components, Nodes, Resources

Page 126 highlights

Cluster Node A Private Network Node A HBA 1 Node A HBA 2 +++ + + ++ + N++o+d+e+B + HBA 2 Node B HBA 1 SAN Switch SAN Switch Cluster Node B Cluster Quorum Mirrorset LUN 1 Storage Area Network Data RAID set Node A LUN 2 Data RAID set Node B LUN 3 Figure 39 Storage server cluster diagram 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 member of the cluster. Resources 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 can be managed in a cluster. • They can be owned by only one node at a time. Examples of cluster resources are IP addresses, network names, physical disk resources, and file shares. Resources represent individual system components. These resources are organized into groups and managed as a group. Some resources are created automatically by the system and other resources must be set up manually. Resource types include: • IP address resource • Cluster name resource • Cluster quorum disk resource • Physical disk resource • Virtual server name resources 126 Cluster administration

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Cluster 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
+
+
+
+
+++++++++++++++++++++++++++++++++++++++++++++++++++
+
+
+
+
+
+
+
+
Figure 39 Storage server cluster diagram
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 member of the cluster.
Resources
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 can be managed in a cluster.
They can be owned by only one node at a time.
Examples of cluster resources are IP addresses, network names, physical disk resources, and file
shares. Resources represent individual system components. These resources are organized into groups
and managed as a group. Some resources are created automatically by the system and other resources
must be set up manually. Resource types include:
IP address resource
Cluster name resource
Cluster quorum disk resource
Physical disk resource
Virtual server name resources
Cluster administration
126