eG Monitor
 

Measures reported by FCCluCoreResTest

A cluster requires that a set of resources be online in order to operate. These resources are called the core resources, and consist of:

  • An IP Address resource, an IPv6 Address resource, and/or an IPv6 Tunnel Address resource that provides the cluster IP address.

  • A Network Name resource that provides the cluster name. This resource depends on the IP Address resource, IPv6 Address resource, and/or IPv6 Tunnel Address resource to create a failover cluster instance.

  • A quorum resource that ensures cluster integrity and the persistence of accurate state information.

The core resources by default, reside in a single group called the cluster group. The cluster group is created automatically during cluster setup.

If the core resources cannot be brought online, the cluster will not form and no resources in any group will be online. In other words, if the core resources take too long to be available or if the core resources frequently goes offline, then it means that the entire cluster group is failing frequently causing inconvenience to the users uisng the cluster. Administrators should therefore, continuously keep track on the current state of the core resources to proactively detect any abnormalities with respect the state of the core resources. The FCCluCoreResTest helps administrators in this regard.

This test auto-discovers the core resources of a cluster group and reports the current state of each core resource. This way, administrators may proactively be alerted to abnormalities, if any.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
State Indicates the current state of this core resource.   The values that this measure can report and the states they indicate have been listed in the table below:

Measure Value Numeric Value
Online 100
Online Pending 90
Inherited 80
Initializing 70
Pending 60
Offline Pending 50
Unknown 40
Offline 20
Failed 0

Note:

By default, this measure can report the Measure Values mentioned above while indicating the current state of each core resource. However, the graph of this measure is indicated using the numeric equivalents.

The detailed diagnosis of this measure lists the owner node, the type of the core resource and the cluster group.