Manage replication in the cluster
Replication is a service provided by WAS 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.
- 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. Enabling data replication for dynamic caching in a cluster environment is absolutely necessary to maintain 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.
- Windows and UNIX: Dynamic cache service settings
- Windows and UNIX: Memory-to-memory replication
- Windows and UNIX: Configure for database session persistence
- i5/OS: Dynamic cache service settings
- i5/OS: Memory-to-memory replication
- i5/OS: Configure for database session persistence
- 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 handling that session. This capability is referred to as distributed sessions. WAS provides two techniques that 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.
Operating system Additional information Windows UNIX
- For general information, see Session management support.
- For memory-to-memory information, see Memory-to-memory replication.
- For database session information, see Configure for database session persistence.
i5/OS
- For general information, see Session management support.
- For memory-to-memory information, see Memory-to-memory replication.
- For database session information, see Configure for database session persistence.
Parent topic:
Manage the cluster
Related information
http://publib.boulder.ibm.com/infocenter/wasinfo/v6r1/index.jsp