HP ProLiant DL380 G5 DPSS, Руководство администратора

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Node-based cluster groups
Creating only one resource group and one virtual server for each node facilitates group and resource
administration. This setup allows administrators to include all fi le share resources under one group.
Clients access all of the resources owned by one node through a virtual server name.
In node-based cluster groups, each group has its own network name and IP address. The administrator
decides on which node to place each physical disk resource. This con fi guration provides a very coarse
level of granularity. All resources within a group must remain on the same node. Only two IP addresses
and network names are required. This con fi guration creates less overhead for resource and network
administration. A possible disadvantage of this approach is that the resource groups can potentially
grow large when many fi le shares are created.
Load balancing
The creation of separate cluster groups for each virtual server provides more fl exibility in balancing the
processing load on the cluster between the two nodes. Each cluster group can be assigned to a cluster
node with the preferred owner parameter. For example, if there are two cluster groups, the cluster could
be set up to have the fi rst cluster group owned by Node A and the second cluster group owned by Node
B. This allows the network load to be handled by both devices simultaneously. If only one cluster group
exists, it can only be owned by one node and the other node would not serve any network traf fi c.
Cluster resource overview
Hardware and software components that are managed by the cluster service are called cluster resources.
Resources represent individual system components. These resources are then 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:
• IP Address resource
• Cluster name resource
• Cluster Quorum disk resource
• Physical Disk resource
• Virtual server name resources
• CIFS fi le share resources
• NFS fi le share resources
File share resource planning issues
CIFS and NFS are cluster-aware protocols that support the Active/Active cluster model, allowing resources
to be distributed and processed on both nodes at the same time. For example, some NFS fi le share
resources can be assigned to a group owned by a virtual server for Node A and additional NFS fi le
share resources can be assigned to a group owned by a virtual server for Node B.
Con
fi guring the fi le shares as cluster resources provides for high availability of fi le shares. Because the
resources are placed into groups, ownership of the fi les can easily move from one node to the other,
as circumstances require. If the cluster node owning the group of fi le shares should be shut down or
fail, the other node in the cluster will begin sharing the directories until the original owner node is
brought back on line. At that time, ownership of the group and its resources can be brought back
to the original owner node.
Resource planning
1. Create at least one virtual server for each node in the cluster.
HP ProLiant DL380 G5 Storage Server 133