Determining application sharing between clusters
If applications are shared between clusters, there are maintenance implications. An application definition is cell-scoped, meaning that a single application can be used by any server running on any node within the cell.
The relationship between an enterprise application and the server where it runs is called a mapping. For a cluster to run an instance of an application, the application must be mapped to that cluster. An application that is shared between multiple clusters will have multiple mappings. Since only one instance of the application in the cell can exist, there can only be one application root defined for that application across multiple clusters.
For example, if the URI /wps/portal is used to access WebSphere Portal, /wps is the application root for the entire cell. If there are two different WebSphere Portal clusters in the same cell, they will have to share the same application root, for example: /wps, but they can have different servlet mappings, for example, /portal and /myportal.
Perform the following steps to determine what mappings exist for a particular application:
- Open the Deployment Manager administration console.
- Depending on your version of WAS, make the appropriate selection from the navigation:
- For WAS v6.1:
Click Applications > Enterprise Applications in the navigation pane.
- For WAS v7:
Click Applications > Application Types > WebSphere enterprise applications in the navigation pane.
- Find and click the required application.
- Click Target specific application status from the options under that application. The resulting table will show all server and cluster profiles to which this application is mapped.
Parent topic:
Manage the cluster