OAS10g 10.1.3 Clustering

The static configuration model is essentially the same mechanism used in Oracle Application Server 10.1.2 and 9.0.4. It continues to be supported primarily to provide backward compatibility with these earlier releases.

Figure 8-5 Static Node-to-Node Model


Description of "Figure 8-5 Static Node-to-Node Model"


In this configuration, a node list containing the host address and ONS remote listener port for each node in the cluster is supplied. Prior to Oracle Application Server Release 3 (10.1.3.0.0), when ONS configuration data was integrated into opmn.xml, this configuration would have been set in the ons.conf configuration file.

Define the host address and the ONS remote listener port - specified within the subelement of - for each node in the cluster within the subelement. Separate each node from the next with a comma.

For example:









...


Supply the same list for each node in the cluster; each ONS instance will identify itself in the list and ignore that entry.


Note:

The opmn.xml file must be reloaded for changes to take effect in the OPMN runtime. Run the following command on the affected node to reload opmn.xml:
opmnctl reload

This command will not affect OPMN-managed components, including Oracle HTTP Server, OC4J, and deployed applications.



Viewing the Status of a Cluster
You can view the current status of the Oracle Application Server components within a cluster, using either opmnctl or Application Server Control Console.

•Viewing Cluster Status with opmnctl

•Viewing Cluster Status in Application Server Control Console

Viewing Cluster Status with opmnctl
You can check the status of the cluster using opmnctl on any Oracle Application Server node within the cluster.

opmnctl @cluster status

The output shows the status of the components installed in each active Oracle Application Server instance within the cluster:

Processes in Instance: AppSrv1.comp1.yourcompany.com
-------------------+--------------------+---------+---------
ias-component | process-type | pid | status
-------------------+--------------------+---------+---------
OC4JGroup:COLORS | OC4J:home | 26880 | Alive
OC4JGroup:COLORS | OC4J:oc4j_soa | 26256 | Alive
HTTP_Server | HTTP_Server | 26879 | Alive

Processes in Instance: AppSrv2.comp2.yourcompany.com-------------------+--------------------+---------+---------
ias-component | process-type | pid | status
-------------------+--------------------+---------+---------
OC4JGroup:COLORS | OC4J:home | 26094 | Alive
OC4JGroup:COLORS | OC4J:oc4j_soa | N/A | Down
HTTP_Server | HTTP_Server | 26093 | Alive





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