The PowerHA® SystemMirror summary
page provides a summary of your system resources, the status of those
resources, and links to common management tasks.
Health Summary
This section provides a status
summary of the nodes and resource groups across all of your clusters.
The number of nodes or resource groups in each category is represented
in a chart and an adjacent list.
The following status categories
apply to the Summary of node status across all clusters and Summary
of resource group status across all clusters sections:
Unknown
- The status cannot be attained. Components are in the Unknown category
if there is a loss of communication between the IBM® Systems Director server
and the controlling node.
OK
- All components are operating properly.
Not
Configured
- Nodes in this category have either not been added to a cluster
or they have been defined as part of a cluster but the cluster configuration
process is not completed. To complete the cluster configuration process,
synchronize the affected node.
Not
synchronized
- Nodes in this category contain changes that were made only on
the controlling node; therefore, these changes do not exist on the
other nodes of the cluster.
If this state occurs on the controlling
node of a cluster, you can correct the problem by doing one of the
following tasks:
- Synchronize the cluster, which propagates the changes that were
made on the controlling node to all of the other nodes in the cluster.
- Discard all of the unsynchronized changes that are on the controlling
node.
If this state occurs on another cluster node, changes
that were made to that node will be erased during a synchronization
process. To avoid that situation, perform the following steps:
- Make the Not synchronized node become the
controlling node.
- Refresh the cluster data to load the current cluster configuration
from the perspective of the selected node.
- Evaluate the configuration on the node, and determine whether
you will keep the changes on this node (by synchronizing the cluster)
or discard the changes.
Warning
- Clusters in this category reported one or more conditions that
require administrator attention.
Offline
- Nodes in this category do not have active cluster services, are
not hosting any managed resources, and are not highly available. To
return these nodes to a high availability state, start cluster services
by bringing them online.
Unmanaged
- Nodes in this category do not have active cluster services, but
all of the formerly managed resources continue to run on them. Nodes
in this state are not highly available.
Administrators change the
status of nodes to the Unmanaged state so that
maintenance can be performed on PowerHA SystemMirror systems without
creating downtime for the managed resources on those nodes. To return
these nodes to a high availability state, start cluster services on
them.
Error
- Clusters in this category reported one or more error conditions.
User interaction is required.
Cluster Management
- Manage Clusters
- Provides a link to the Manage Clusters page
where you can perform and monitor cluster management tasks.
- Create a Cluster
- Provides a link to the Create Cluster wizard
that can help you complete all of the steps that are necessary to
create a cluster.
Resource Group Management
- Manage Resource Groups
- Provides a link to the Manage Resource Groups page
where you can perform and monitor resource groups tasks.
- Add a Resource Group
- Provides a link to the Add a Resource Group wizard
that can help you complete all of the steps that are necessary to
create a resource group.