CHAPTER 2Clustering Basics and History
As defined in Chapter 1, a cluster is a group of interconnected nodes that acts 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. The servers participating in the cluster must be homogenous—that is, they must use the same platform architecture, operating system, and almost identical hardware architecture and software patch levels—as well as independent machines that respond to the same requests from a pool of client requests.
From another perspective, clustering can also be viewed as host virtualization in the modern cloud computing ...
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