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Configuring clusters
This section contains procedures to assist you in configuring basic cluster functions.
It is assumed that the cluster installation procedures in “Cluster setup” on page 39
have completed without errors, and both cluster nodes are running.
It is recommended that you review the Cluster Administration Guide , located in the
IBM NAS Admin in the Cluster Tools folder, before continuing with the following
steps.
Configuring cluster state and properties
You must complete the following steps on the first node to reset the size of the
logfile and set the priority and purpose of the private network.
1. Select Cluster Administration , located in IBM NAS Admin, in the Cluster Tools
folder.
If prompted for a cluster name, enter the name of the cluster, and then click
Open .
2. The cluster name appears in the left panel. Click the cluster name to see the
status of the cluster nodes in the right pane. The state of both nodes should be
“Up”.
3. Right-click the cluster name and select Properties .
a. Select Quorum Disk , and change the Reset quorum log at: field from 64 KB
to 4096 KB.
b. Select Network Priority to view all networks acknowledged by the cluster
server, and then select the private network connection and move it to the
top for cluster communication priority by clicking
Move Up .
This provides internal communication to the private network before attempts
are made to communicate over any public networks that are installed. Do
not change the communication options for the public network adapters as
they should support both network and cluster traffic.
4. Open the properties for the private network and select Internal cluster
communication only (private network) to ensure that no client traffic will be
placed on the private network.
5. Click Apply , OK , and then OK .
Setting up cluster resource balancing
When you configure cluster resources, you should manually balance them on the
disk groups to distribute the cluster resource functions between the two nodes. This
allows for a more efficient response time for the clients and users accessing these
resources.
To set up cluster resource balancing:
1. Select a disk group and bring up its Properties panel by right-clicking it.
2. Click the General tab.
3. Click the Modify button to the right of the Preferred owners: field.
4. In the Available nodes pane, select a node and click the → button to move the
node to the Preferred Owners pane.
5. Complete Steps 1 through 4 for each disk group.
Each disk group has a preferred owner so that, when both nodes are running, all
resources contained within each disk group have a node defined as the owner of
Chapter 5. Completing networking, clustering, and storage access setup
41