Cluster Terms And Components; Nodes; Resources; Storage Server Cluster Diagram - HP PROLIANT ML110 G5 User Manual

Cluster Node A
Node A
HBA 1
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
128 Cluster administration
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Node B
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HBA 2
SAN Switch
Storage Area Network
Cluster
Quorum
Mirrorset
LUN 1
Private Network
Node A
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HBA 2
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SAN Switch
Data RAID set
Data RAID set
Node A
LUN 2
Cluster Node B
Node B
HBA 1
Node B
LUN 3