Compaq DIGITAL Server Cluster Kits for Windows NT manual Using ServerWORKS Manager with Clusters

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Using ServerWORKS Manager with Clusters

A cluster provides high availability of services to the network. Typically, a cluster consists of two servers that are similarly configured with resources like applications, databases, and hardware components. When a server on which the resource groups reside is unavailable, another cluster continues to provide the resources. Reasons for unavailability include downtime for scheduled maintenance and backup or component failure of a resource, for example, a server goes down.

You must configure a cluster based on the operating system instructions.

Note: DCNT and MSCS may use different configuration methods and terminology. When a cluster is operating, the server controlling a resource group is referred to as the controlling cluster. When the ownership of a group moves from one node to another, the action is called failover. If the ownership returns to the first server that was providing control of the resource group, the action is called failback.

Discovering Clusters

IP Discovery finds DCNT and MSCS clusters on your network. You can set up cluster members to send SNMP traps when a cluster group fails over. The message indicates a transition of control from one cluster member to another. You can view the details about a cluster member using the System Browser. See Figure 1-1.

Figure 1-1 Discovered Clusters on a Map View

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DIGITAL Server Cluster Kits for Windows NT Configuration Guide