IBM WAS provides a replication service. This service transfers data, objects, or events among application servers. Data replication can be used to make data for session manager, dynamic cache, and stateful session beans available across many application servers in a cluster.
By default, the 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 WebSphere Application Server component that replicates data among application servers. WebSphere Portal can use data replication for dynamic caching and for memory-to-memory replication of session data. Data replication for dynamic caching maintains data integrity between multiple WebSphere Portal 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 supports HTTP session failover, which enables one node in a cluster to access information from the existing HTTP session in a failure in the cluster node originally handling that session. Distributed session support is not enabled by default, so we must determine whether to provide this capability, and, if so, which of the two techniques we use...
Parent Manage the cluster