Portal, V6.1
OS: AIX, HP-UX, i5/OS, Linux, Solaris, Windows

 

Manage replication in a cluster

 

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Replication is a service provided by WAS that 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.

 

Dynamic caching

Data replication service (DRS) is the internal WAS component that replicates data among application servers. 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.

Dynamic cache service settings...

 

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 a cluster, and, if so, which of the two techniques you will use: memory-to-memory session replication and database session persistence.

OS Additional information
Windows UNIX

i5/OS

 

Parent topic

Manage a cluster

 

Related tasks

http://publib.boulder.ibm.com/infocenter/wasinfo/v6r1/index.jsp