Clusters
An PowerHA® SystemMirror® cluster is a group of processors that cooperate to provide a highly available environment.
Available cluster information
Clinfo maintains the following information about configured clusters:
Cluster name
A cluster name uniquely identifies a cluster. The administrator specifies the name when the cluster is configured.
Cluster ID
A cluster ID identifies each cluster. The cluster ID is a numeric value assigned by PowerHA SystemMirror (this is not user-defined) at the time the cluster is configured.
Cluster state
A cluster can be in one of the following defined states:
| Item | Description |
|---|---|
| CLS_UP | At least one node in the cluster is up, and a primary is defined. |
| CLS_DOWN | No nodes are up. |
| CLS_UNKNOWN | Clinfo is unable to communicate, or is not yet communicating with an SNMP process on any active cluster. |
| CLS_ NOTCONFIGURED | The cluster is not yet configured. |
Cluster substate
A cluster can be in one of several defined substates:
| Item | Description |
|---|---|
| CLSS_ERROR | An error occurred and manual intervention is required. |
| CLSS_RECONFIG | A dynamic reconfiguration of the cluster is in progress. |
| CLSS_STABLE | The cluster is stable (no reconfiguration is occurring). |
| CLSS_UNSTABLE | The cluster is unstable. The event history will show what events are happening. |
| CLSS_UNKNOWN | Clinfo is unable to communicate with an SNMP process on a cluster node |
| CLSS_ NOTCONFIGURED | The cluster is not yet configured. |
| CLSS_NOTSYNCHED | Some basic cluster configuration information exists, but the cluster has not yet been verified and synchronized. |
Primary node name
The designation of a primary node is leftover from deprecated features in prior releases. It currently has no function and does not impact the behavior. It is maintained only for binary compatability.
Cluster number of nodes
The number of nodes defined in the cluster.
Cluster number of networks
The total number of networks in the cluster.
Cluster number of resource groups
The total number of resource groups configured.
Cluster number of sites
If sites are in use, the number of sites configured.