CHAPTER 15RAC Extensions
As Real Application Clusters is an increasingly common solution for scalability across enterprises, it is time to think beyond the obvious usage of the technology. RAC is designed primarily as a scalability and availability solution that resides in a single data center. However, it is possible, under certain circumstances, to build and deploy an RAC system in which the nodes in the cluster are separated by great distances.
The choice of extending RAC depends on the failure it is designed to address. To protect against multiple points of failure, a cluster must be geographically dispersed: nodes can be put in different rooms, on different floors of a building, or even in separate buildings or separate cities. Your decision ...
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