Manage replication in the cluster
Replication is a service provided by IBM WebSphere Application Server that transfers data, objects, or events among appservers. Data replication can be used to make data for session manager, dynamic cache, and stateful session beans available across many appservers in a cluster.By default, the IBM WebSphere Portal cluster scripts enable dynamic caching for each cluster member. The replication type is set to NOT SHARED.
- Dynamic caching
- Data replication service (DRS) is the internal WAS component that replicates data among appservers. There are several types of data replication, and WebSphere Portal can make use of data replication for dynamic caching and for memory-to-memory replication of session data. Enable data replication for dynamic caching in a cluster environment maintain data integrity between multiple nodes in the cluster. Replication also helps improve performance by generating data once, and then replicating it to other servers in the cluster.
- Distributed sessions
- WebSphere Portal can use the WAS capabilities to support HTTP session failover, which enables one node in a cluster to access information from the existing HTTP session in case of a failure in the cluster node originally handline that session. This capability is referred to as distributed sessions. WAS provides two techniquethat can be used for distributed sessions, either of which can be used in a WebSphere Portal cluster. Distributed session support is not enabled by default, so you will have to determine whether to provide this capability in the cluster, and, if so, which of the two techniques you will use: memory-to-memory session replication and database session persistence.
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Parent: Manage the cluster