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J2EE™ and Beyond: Design, Develop, and Deploy World-Class Java™ Software by Art Taylor

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Server Clusters and Failover capabilities

In order to provide both failover and additional scalability, application server vendors allow clusters or groups of hardware servers running the same software to be addressed as a server cluster (see Figure 24-5). This server cluster appears as a single server to external clients, which continue to make requests of a single application server host.

Figure 24-5. Server cluster.

The operation and management of the server cluster is completely under control of the EJB container. The implementation of the server clustering is transparent to the EJB component. Application server vendors provide configuration ...

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