After creating a server cluster, you can monitor its runtime state,
change its configuration, start and stop the cluster or cluster members, and
perform a range of other administrative tasks to manage the cluster.
The running of applications and services depends on the configuration
and running of the cluster and the servers that are members of the cluster.
After creating a server cluster, you can perform a range of administrative
tasks to manage the cluster.
You can manage clusters using either the administrative
console or a range of wsadmin commands.
This topic provides a summary
of alternative ways to manage available clusters with the administrative console,
and provides links to where the associated tasks are described.
- Display the list of clusters.
In the navigation pane,
click .
This displays the Server
Cluster collection page, which lists the clusters. For each cluster,
this page also shows the status that indicates whether a cluster is started,
stopped, or unavailable. You can use this page to perform a number of actions
on clusters; for example, to create new clusters, start or stop clusters,
or open a page of detail settings for a cluster.
- Display details about a cluster.
Display the list
of clusters then, on the Server Cluster collection page,
click the name of the cluster.
This displays the
settings page for that cluster. You can use this page to view or change the
configuration and local topology of a server cluster. If you saved your administrative
configuration after creating the server cluster, you can also view runtime
information about the server cluster.
- Display the list of servers that are members of a cluster.
Display details about a cluster then, on the Server Cluster settings
page, click Cluster members.
This displays the Cluster
Members collection page, which lists the members of the cluster,
states the nodes on which members reside, and states whether members are started,
stopped or encountering problems. You can use this page to perform a number
of actions on cluster members; for example, to create new cluster members,
or open a page od detail settings for a cluster member.
- Create
new members of a cluster
Display
the Cluster Members collection page, then click Cluster
members. The Cluster members page lists members of a cluster,
states the nodes on which members reside, and states whether members are started,
stopped or encountering problems.
- Start a cluster.
To
be able to run applications and services, a cluster must be started.
Display
the list of clusters then, on the Server Cluster collection
page, select the checkbox for the cluster, then click Start or Ripplestart.
- Monitor the running of clusters and
their members.
You must monitor the status of run-time
components to ensure that after starting they remain operational as needed.
You
can browse messages displayed in the cluster logs. You can also use the page of the administrative console to monitor the status of
run-time components.
- Tune the behavior of the workload management run time
If your application is experiencing problems with timeouts
or your network experiences extreme latency, change the timeout interval for
the com.ibm.CORBA.RequestTimeout property. Or, if the workload management
state of the client is refreshing too soon or too late, change the interval
for the com.ibm.websphere.wlm.unusable.interval property.
- Stop a cluster.
Stopping a server cluster
prevents it being used to run applications and services.
Display the
list of clusters then, on the Server Cluster collection
page, select the checkbox for the cluster, then click Stop or Immediate
Stop.
- Delete a cluster member.
Deleting a cluster
member removes the server from the cluster, and deletes the server. You cannot
delete a cluster member without deleting the server.
Display the list
of cluster members then, on the Cluster Members collection
page, select the checkbox for the cluster member, then click Delete.
- Delete a cluster.
If you delete a server
cluster, the action deletes the cluster and all its cluster members. When
you delete a cluster, there is no option to keep certain cluster members or
applications that you have installed on any part of the cluster
Display
the list of clusters then, on the Server Cluster collection
page, select the checkbox for the cluster, then click Delete.