Oracle Database Clustering Basics and Its Evolution

As defined in the previous chapter, a cluster is a group of interconnected nodes that act like a single large server capable of growing and shrinking on demand. In other words, clustering can be viewed logically as a method for enabling multiple standalone servers to work together as a coordinated unit called a cluster. In general, the servers participating in the cluster are homogenous—that is, they use the same platform architecture, operating system, and almost identical hardware architecture and software patch levels (homogenous servers are common but not an absolute requirement, ...

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