Installation guide

Pramati Server 3.5 Administration Guide

Advanced Configuration

Typically a J2EE Cluster node means a ‘BOTH’ node. But a J2EE Cluster can also be configured as

a Web only cluster, EJB only cluster or a combination of Web and EJB nodes.

Setting up Web Replication and Persistence

You can set up a Web Cluster following the same procedure as shown in ‘Creating a Cluster Instance’.

Make sure that you enable the Web Container service for all the nodes. This can be done from the

individual

server_config.xml files.

Additionally, you need to add the following information in your cluster_config.xml file:

<web-cluster>

<web-session-persistence>

in-memory

</web-session-persistence>

<replication-on-all-nodes>

true

</replication-on-all-nodes>

<web-cluster-persist-info>

<url />

<table-name />

</web-cluster-persist-info>

</web-cluster>

Backup nodes can be setup for a Web Cluster only when the web session persistence is set to In-

Memory and replication on all nodes is set to false. Enable the Web cluster by setting 'enabled' as

‘true’. There can be two kinds of Web session persistence:

• In-memory Persistence

• Database Persistence

When you select your Web session persistence to be in-memory, the HTTP session objects are

persisted in memory locally for nodes in the same VM and persisted through RMI calls for nodes in

different VM.

EJB - Required

Web Required -

Table 32: J2EE Cluster Node Type and required services

J2EE Node Type Web Container EJB Container