Oracle Real Application Clusters Solution
Oracle Corporation introduced database clustering with Oracle version 6.2 exclusively on the DEC VAX/VMS. We will deal with many details of Oracle RAC in later chapters and see how it provides for high availability and scalability.
Essentially, Oracle RAC provides the ability for multiple servers to consistently access a single copy of the data. Theoretically, as the requirement to access this single copy increases, you keep adding nodes to the cluster. This ability to provide consistent access is not simple—the process requires a lot of coordination between the various nodes in the cluster. Oracle RAC does this efficiently, and we will see how exactly this occurs in later chapters.
Although Oracle RAC ...
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