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Implementing SOA: Total Architecture in Practice by Paul C. Brown

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Chapter 34. Multiple Component Failover

Intra-Site versus Inter-Site Failover

Looking beyond the failover of a single component, larger patterns begin to emerge when you begin to consider the failover of services and their clients as shown in Figure 34-1. While you might, theoretically, allow clients at one site to access services at the other site, this requires the service access mechanism to act as a router for service requests. To route properly, the router would have to know how to access all instances of the service as well as their current status. The router would also have to be configured with appropriate rules governing routing within and between sites. Finally, the router itself would require an instance at each site and its own failover ...

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