Setting Up Cluster Resource Balancing; Setting Up Failover - IBM totalstorage 326 User Reference

4. Open the properties for the private network and select Internal cluster
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
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
those resources. Even though a disk group has a preferred owner, its resources
can run on the other node in the cluster following a failover. If you restart a cluster
node, resources that are preferentially owned by the restarted node failback to that
node when the cluster service detects that the node is operational, and provided
that the defined failover policy allows this to occur. If you have not defined the node
as the preferred owner for the resources, then they do not failback to the node.
Note: You must reboot before you can see changes made to the cluster resource

Setting up failover

The failover of resources under a disk group on a node enables users to continue
accessing the resources if the node goes down. Individual resources contained in a
group cannot be moved to the other node; rather, the group it is contained in is
moved. If a disk group contains a large number of resources and any one of those
resources fails, then the whole group will failover according to the group's failover
policy.
The setup of the failover policies is critical to data availability.
To set up the failover function:
1. Open the Properties panel for the disk group.
2. Select the Failover tab to set the Threshold for Disk Group Failure.
3. Select the Failback tab to allow, or prevent, failback of the disk group to the
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Model 326 User's Reference
communication only (private network) to ensure that no client traffic will be
placed on the private network.
node to the Preferred Owners pane.
balancing.
For example, if a network name fails, clustering services attempts to failover the
group 10 times within six hours, but if the resource fails an eleventh time, the
resource remains in a failed state and administrator action is required to correct
the failure.
preferred owner, if defined.